| Portsmouth Rhode Island Weather Almanac |
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| Friday,
September 17, 2021 |
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| Cloudy, Late
Morning Rain, Foggy Late, Continued Warm |
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Climate
Normal Period |
Climate Record Period |
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1991 -
2020 |
1893 - 2021 |
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September 17, 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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73 |
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75 |
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72 |
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+1 |
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86 |
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in |
1991 |
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57 |
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in |
1954 |
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| Minimum
Temperature |
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64 |
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61 |
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57 |
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+7 |
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69 |
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in |
1991 |
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43 |
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in |
1948 |
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| Average Temperature |
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69 |
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68 |
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64 |
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+5 |
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78 |
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in |
1991 |
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53 |
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in |
2013 |
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| Month Avg Max Temperature |
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75.9 |
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76.6 |
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74.1 |
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+1.8 |
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81.2 |
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in |
1983 |
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68.1 |
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in |
1917 |
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| Month Avg
Min Temperature |
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61.8 |
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60.1 |
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59.2 |
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+2.6 |
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64.8 |
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in |
1961 |
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52.7 |
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in |
1893 |
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| Month Average
Temperature |
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69.2 |
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68.6 |
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66.6 |
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+2.5 |
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73.1 |
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in |
1961 |
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61.4 |
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in |
1963 |
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| High
Heat Index |
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75 |
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76 |
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71 |
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+4 |
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96 |
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in |
1991 |
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| Low Wind Chill |
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41 |
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in |
1959 |
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| HDD |
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0 |
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0 |
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3 |
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-3 |
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12 |
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in |
2013 |
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0 |
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in |
2021 |
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| Month HDD |
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1 |
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12 |
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23 |
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-22 |
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85 |
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in |
1913 |
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0 |
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in |
2015 |
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| Season HDD |
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10 |
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12 |
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30 |
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-20 |
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97 |
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in |
1913 |
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0 |
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in |
2015 |
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| CDD |
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4 |
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3 |
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2 |
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+2 |
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13 |
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in |
1991 |
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0 |
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in |
2019 |
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| Month CDD |
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72 |
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74 |
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51 |
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+21 |
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148 |
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in |
1961 |
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7 |
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in |
1975 |
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| Year CDD |
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755 |
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840 |
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588 |
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+167 |
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840 |
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in |
2020 |
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280 |
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in |
1902 |
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| Maximum Dew Point |
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69 |
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65 |
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62 |
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+7 |
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72 |
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in |
1991 |
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43 |
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in |
2013 |
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| Minimum
Dew Point |
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62 |
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57 |
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52 |
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+10 |
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68 |
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in |
1991 |
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28 |
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in |
1959 |
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| Average Dew Point |
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66 |
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61 |
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57 |
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+9 |
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70 |
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in |
1991 |
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38 |
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in |
1959 |
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| Month Avg Max Dew Point |
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67.3 |
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65.9 |
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64.2 |
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+3.1 |
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69.0 |
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in |
2018 |
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55.1 |
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in |
1975 |
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| Month Avg
Min Dew Point |
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58.0 |
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54.8 |
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54.8 |
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+3.2 |
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60.9 |
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in |
2018 |
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44.6 |
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in |
1967 |
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| Month Average Dew Point |
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62.9 |
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60.5 |
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59.4 |
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+3.5 |
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65.2 |
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in |
2018 |
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50.1 |
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in |
1967 |
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| Precipitation |
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.07 |
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.00 |
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.14 |
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-.07 |
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2.66 |
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in |
1933 |
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| One Hour |
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.07 |
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.00 |
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.76 |
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in |
1995 |
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| Hourly Rate |
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.41 |
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.00 |
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1.47 |
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in |
2005 |
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| Month Precipitation |
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8.56 |
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.66 |
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2.05 |
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+6.51 |
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8.56 |
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in |
2021 |
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.03 |
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in |
1980 |
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| Year Precipitation |
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37.66 |
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24.69 |
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31.33 |
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+6.33 |
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46.35 |
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in |
1998 |
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17.53 |
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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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September
17, 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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99% |
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94% |
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93% |
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+6% |
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100% |
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in |
2017 |
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67% |
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in |
2000 |
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| Minimum
Humidity |
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88% |
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66% |
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61% |
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+27% |
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98% |
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in |
1993 |
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28% |
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in |
1968 |
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| Average Humidity |
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94% |
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80% |
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77% |
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+16% |
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99% |
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in |
1993 |
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54% |
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in |
1950 |
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| Maximum Barometer |
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30.30 |
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30.12 |
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30.16 |
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+00.14 |
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30.55 |
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in |
1986 |
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29.83 |
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in |
1952 |
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| Minimum
Barometer |
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30.12 |
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29.97 |
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29.94 |
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+00.18 |
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30.37 |
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in |
2011 |
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29.18 |
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in |
1999 |
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| Average Barometer |
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30.21 |
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30.05 |
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30.05 |
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+00.16 |
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30.43 |
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in |
2011 |
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29.52 |
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in |
1999 |
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| Average Wind |
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5.6 |
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5.7 |
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5.4 |
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+0.2 |
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18.9 |
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in |
1999 |
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0.9 |
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in |
2006 |
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| Direction |
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NE |
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SW |
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N |
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WNW |
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SSE |
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| High Wind Gust |
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17 |
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22 |
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20 |
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-3 |
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50 |
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in |
1999 |
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10 |
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in |
2006 |
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| Direction |
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ENE |
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SW |
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NNE |
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SW |
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S |
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| Maximum Water Temp |
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70.5 |
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68.7 |
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68.2 |
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+2.3 |
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71.1 |
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in |
2015 |
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64.8 |
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in |
2013 |
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| Minimum
Water Temp |
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69.8 |
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67.5 |
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66.3 |
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+3.5 |
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69.8 |
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in |
2021 |
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61.8 |
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in |
2013 |
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| Average Water Temp |
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70.2 |
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68.1 |
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67.3 |
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+2.9 |
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70.2 |
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in |
2021 |
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63.3 |
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in |
2013 |
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| Sunrise/ AM Twilight |
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6:26:42 AM |
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6:00:23 AM |
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| Sunset /
PM Twilight |
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6:52:28 PM |
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7:18:47 PM |
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| Length Of Day |
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12:25:46 |
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| Special Conditions |
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Fog |
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| Comments |
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| Hour-by-Hour Weather For September 17, 2021 |
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| Climate Weather for September 17 |
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| Weather History For September 17 |
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| Weather Calendar |
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| Back
To Weather Stat Page |
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