| Portsmouth Rhode Island Weather Almanac |
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| Sunday,
September 12, 2021 |
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| Clear, Windy
and Warmer |
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Climate
Normal Period |
Climate Record Period |
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1991 -
2020 |
1893 - 2021 |
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September 12, 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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75 |
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73 |
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73 |
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+2 |
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87 |
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in |
1961 |
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60 |
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in |
1950 |
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| Minimum
Temperature |
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66 |
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52 |
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58 |
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+8 |
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71 |
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in |
1947 |
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45 |
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in |
1985 |
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| Average Temperature |
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71 |
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63 |
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66 |
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+5 |
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79 |
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in |
1961 |
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54 |
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in |
1967 |
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| Month Avg Max Temperature |
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75.6 |
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78.2 |
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74.8 |
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+0.8 |
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85.2 |
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in |
1983 |
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68.4 |
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in |
1917 |
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| Month Avg
Min Temperature |
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61.2 |
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62.5 |
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59.9 |
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+1.3 |
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66.8 |
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in |
1961 |
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51.2 |
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in |
1893 |
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| Month Average Temperature |
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68.7 |
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70.6 |
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67.4 |
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+1.3 |
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75.3 |
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in |
1961 |
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61.9 |
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in |
1994 |
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| High Heat
Index |
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78 |
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72 |
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74 |
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+4 |
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92 |
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in |
1952 |
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| Low Wind Chill |
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#N/A |
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in |
#N/A |
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| HDD |
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0 |
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2 |
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1 |
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-1 |
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11 |
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in |
1967 |
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0 |
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in |
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| Month HDD |
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1 |
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2 |
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12 |
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-11 |
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46 |
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in |
1917 |
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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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2 |
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19 |
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-9 |
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81 |
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in |
1914 |
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0 |
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in |
2015 |
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| CDD |
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6 |
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0 |
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2 |
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+4 |
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14 |
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in |
1961 |
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0 |
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in |
2020 |
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| Month CDD |
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45 |
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69 |
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41 |
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+4 |
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124 |
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in |
1961 |
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0 |
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in |
1893 |
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| Year CDD |
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728 |
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835 |
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578 |
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+150 |
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835 |
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in |
2020 |
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279 |
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in |
1902 |
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| Maximum Dew Point |
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69 |
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55 |
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64 |
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+5 |
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73 |
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in |
2018 |
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45 |
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in |
1985 |
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| Minimum
Dew Point |
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62 |
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49 |
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54 |
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+8 |
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69 |
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in |
1961 |
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34 |
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in |
2004 |
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| Average Dew Point |
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66 |
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52 |
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59 |
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+7 |
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70 |
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in |
1971 |
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42 |
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in |
1985 |
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| Month Avg Max Dew Point |
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66.3 |
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67.7 |
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64.8 |
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+1.5 |
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70.4 |
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in |
1961 |
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55.8 |
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in |
1984 |
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| Month Avg
Min Dew Point |
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57.3 |
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57.8 |
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55.5 |
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+1.8 |
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63.8 |
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in |
1961 |
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43.9 |
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in |
1967 |
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| Month Average Dew Point |
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62.0 |
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62.9 |
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60.1 |
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+1.9 |
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67.1 |
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in |
1961 |
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50.0 |
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in |
1967 |
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| Precipitation |
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.00 |
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.00 |
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.12 |
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-.12 |
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1.19 |
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in |
1960 |
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| One Hour |
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.00 |
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.00 |
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.34 |
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in |
1960 |
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| Hourly Rate |
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.00 |
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.00 |
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1.24 |
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in |
2009 |
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| Month Precipitation |
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7.60 |
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.66 |
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1.38 |
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+6.22 |
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7.60 |
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in |
2021 |
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T |
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in |
2005 |
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| Year Precipitation |
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36.70 |
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24.69 |
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30.66 |
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+6.04 |
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46.33 |
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in |
1998 |
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17.36 |
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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
12, 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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92% |
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95% |
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90% |
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+2% |
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100% |
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in |
2018 |
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74% |
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in |
2002 |
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| Minimum
Humidity |
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78% |
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45% |
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55% |
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+23% |
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94% |
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in |
2018 |
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23% |
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in |
2004 |
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| Average Humidity |
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85% |
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70% |
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73% |
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+12% |
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97% |
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in |
2018 |
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55% |
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in |
2002 |
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| Maximum Barometer |
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30.14 |
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30.35 |
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30.13 |
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+00.01 |
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30.52 |
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in |
1966 |
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29.77 |
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in |
1968 |
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| Minimum
Barometer |
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29.97 |
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30.27 |
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29.90 |
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+00.07 |
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30.30 |
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in |
2003 |
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28.66 |
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in |
1960 |
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| Average Barometer |
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30.06 |
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30.31 |
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30.01 |
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+00.04 |
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30.34 |
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in |
2012 |
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29.29 |
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in |
1960 |
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| Average Wind |
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9.5 |
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4.5 |
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6.5 |
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+3.0 |
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22.8 |
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in |
1960 |
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1.9 |
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in |
1990 |
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| Direction |
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SW |
|
ENE |
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SSW |
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SSE |
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SSE |
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| High Wind Gust |
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36 |
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20 |
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22 |
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+14 |
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81 |
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in |
1960 |
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11 |
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in |
1990 |
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| Direction |
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SSW |
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NE |
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SSW |
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SSE |
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SSW |
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| Maximum Water Temp |
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71.2 |
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69.8 |
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69.1 |
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+2.1 |
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72.3 |
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in |
2005 |
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65.1 |
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in |
2006 |
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| Minimum
Water Temp |
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69.6 |
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67.8 |
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67.2 |
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+2.4 |
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70.0 |
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in |
1999 |
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63.3 |
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in |
2006 |
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| Average Water Temp |
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70.4 |
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68.8 |
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68.2 |
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+2.2 |
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70.6 |
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in |
1999 |
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64.2 |
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in |
2006 |
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| Sunrise/ AM Twilight |
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6:21:38 AM |
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5:55:10 AM |
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| Sunset /
PM Twilight |
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7:01:06 PM |
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7:27:34 PM |
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| Length Of Day |
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12:39:28 |
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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 September 12, 2021 |
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| Climate Weather for September 12 |
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| Weather History For September 12 |
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| Weather Calendar |
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| Back
To Weather Stat Page |
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