| Portsmouth Rhode Island Weather Almanac |
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| Wednesday,
August 18, 2021 |
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| Mostly
Cloudy early then Partly Cloudy, Warmer & Humid |
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| Climate Normal
Period |
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Climate Record Period |
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| 1991- 2020 |
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1893 - 2021 |
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August 18, 2021 |
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Record |
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Record |
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| Observed Daily Data |
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2021 |
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2020 |
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Norm |
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Depart |
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Highest |
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Lowest |
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| Maximum Temperature |
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80 |
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82 |
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78 |
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+2 |
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93 |
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in |
1987 |
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64 |
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in |
1919 |
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| Minimum
Temperature |
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68 |
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66 |
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64 |
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+4 |
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74 |
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in |
1965 |
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52 |
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in |
1979 |
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| Average Temperature |
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74 |
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74 |
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71 |
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+3 |
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82 |
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in |
1987 |
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60 |
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in |
1979 |
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| Month Avg Max Temperature |
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80.8 |
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83.4 |
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79.2 |
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+1.6 |
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85.1 |
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in |
1944 |
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72.3 |
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in |
1964 |
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| Month Avg
Min Temperature |
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65.7 |
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68.3 |
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64.5 |
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+1.2 |
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71.3 |
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in |
1988 |
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55.8 |
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in |
1964 |
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| Month Average
Temperature |
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73.5 |
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76.1 |
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71.8 |
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+1.7 |
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78.1 |
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in |
1988 |
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64.4 |
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in |
1964 |
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| HDD |
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0 |
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0 |
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0 |
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+0 |
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5 |
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in |
1979 |
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0 |
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in |
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| Month HDD |
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0 |
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0 |
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0 |
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+0 |
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24 |
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in |
1964 |
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0 |
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in |
2021 |
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| Season HDD |
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9 |
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0 |
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3 |
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+6 |
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34 |
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in |
1914 |
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0 |
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in |
2020 |
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| CDD |
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9 |
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9 |
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7 |
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+2 |
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17 |
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in |
1987 |
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0 |
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in |
2000 |
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| Month CDD |
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153 |
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199 |
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133 |
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+20 |
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235 |
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in |
1988 |
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13 |
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in |
1964 |
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| Year CDD |
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543 |
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663 |
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461 |
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+82 |
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663 |
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in |
2020 |
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208 |
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in |
1902 |
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| Maximum Dew Point |
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72 |
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69 |
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68 |
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+4 |
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76 |
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in |
1955 |
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53 |
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in |
1981 |
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| Minimum
Dew Point |
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64 |
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61 |
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59 |
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+5 |
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73 |
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in |
1955 |
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42 |
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in |
1981 |
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| Average Dew Point |
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68 |
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65 |
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64 |
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+4 |
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75 |
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in |
1955 |
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48 |
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in |
1981 |
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| Month Avg Max Dew Point |
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70.8 |
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71.9 |
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68.7 |
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+2.2 |
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74.2 |
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in |
2018 |
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57.8 |
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in |
1964 |
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| Month Avg
Min Dew Point |
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62.4 |
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64.1 |
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60.6 |
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+1.8 |
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68.0 |
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in |
2018 |
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47.3 |
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in |
1964 |
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| Month Average Dew Point |
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66.6 |
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68.0 |
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64.6 |
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+2.0 |
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71.1 |
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in |
2018 |
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52.5 |
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in |
1964 |
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| Precipitation |
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.00 |
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.15 |
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.12 |
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-.12 |
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1.55 |
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in |
1955 |
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| One Hour |
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.00 |
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.06 |
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.81 |
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in |
1955 |
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| Hourly Rate |
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.00 |
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.20 |
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6.62 |
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in |
2018 |
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| Month Precipitation |
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4.02 |
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.95 |
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2.15 |
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+1.87 |
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8.35 |
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in |
1992 |
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.08 |
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in |
1940 |
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| Year Precipitation |
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26.85 |
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23.33 |
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27.80 |
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-.95 |
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43.94 |
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in |
1983 |
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15.70 |
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in |
1957 |
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| Snow |
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#N/A |
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#N/A |
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#N/A |
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#N/A |
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#N/A |
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in |
#N/A |
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| Snow Depth |
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#N/A |
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#N/A |
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#N/A |
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in |
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| Month Snow |
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#N/A |
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#N/A |
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#N/A |
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#N/A |
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#N/A |
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in |
#N/A |
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#N/A |
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in |
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| Season Snow |
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#N/A |
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#N/A |
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#N/A |
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#N/A |
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#N/A |
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in |
#N/A |
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#N/A |
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in |
#N/A |
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August
18, 2021 |
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|
Record |
Record |
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| Observed Daily Data |
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2021 |
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2020 |
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Norm |
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Depart |
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Highest |
Lowest |
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| Maximum Humidity |
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97% |
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97% |
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93% |
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+4% |
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100% |
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in |
2019 |
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73% |
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in |
1954 |
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| Minimum
Humidity |
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69% |
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51% |
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57% |
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+12% |
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96% |
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in |
1986 |
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30% |
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in |
1988 |
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| Average Humidity |
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83% |
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74% |
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75% |
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+8% |
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98% |
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in |
1986 |
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55% |
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in |
1954 |
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| Maximum Barometer |
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30.25 |
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29.88 |
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30.04 |
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+00.21 |
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30.37 |
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in |
1989 |
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29.75 |
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in |
1958 |
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| Minimum
Barometer |
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30.14 |
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29.79 |
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29.84 |
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+00.30 |
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30.20 |
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in |
1961 |
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29.45 |
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in |
1988 |
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| Average Barometer |
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30.20 |
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29.84 |
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29.94 |
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+00.25 |
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30.28 |
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in |
1961 |
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29.66 |
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in |
1958 |
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| Average Wind |
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4.8 |
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5.8 |
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5.6 |
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-0.8 |
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12.5 |
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in |
1988 |
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1.4 |
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in |
1992 |
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| Direction |
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SSW |
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SW |
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WNW |
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NNW |
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WNW |
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| High Wind Gust |
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18 |
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24 |
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20 |
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-2 |
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33 |
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in |
1991 |
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9 |
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in |
2010 |
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| Direction |
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S |
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SW |
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S |
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SW |
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NNW |
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| High
Heat Index |
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83 |
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84 |
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80 |
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+3 |
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97 |
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in |
2009 |
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| Low Wind Chill |
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#N/A |
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in |
#N/A |
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| Maximum Water Temp |
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75.0 |
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67.6 |
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71.9 |
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+3.1 |
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75.4 |
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in |
2012 |
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67.6 |
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in |
2020 |
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| Minimum
Water Temp |
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72.0 |
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65.8 |
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68.7 |
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+3.3 |
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73.4 |
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in |
2018 |
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64.0 |
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in |
2008 |
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| Average Water Temp |
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73.5 |
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66.7 |
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70.3 |
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+3.2 |
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74.2 |
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in |
2018 |
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66.7 |
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in |
2020 |
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| Sunrise/ AM Twilight |
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5:58:20 AM |
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5:29:00 AM |
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| Sunset /
PM Twilight |
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7:39:22 PM |
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8:08:42 PM |
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| Length Of Day |
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13:41:02 |
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| Special Conditions |
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None |
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| Comments |
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| Hour-by-Hour Weather For August 18, 2021 |
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| Climate Weather for August 18 |
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| Weather History For August 18 |
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| Weather Calendar |
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| Back
To Weather Stat Page |
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