| Portsmouth Rhode Island Weather Almanac |
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| Wednesday,
September 15, 2021 |
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| Cloudy &
Fog early, Mostly Cloudy Day to Partly Cloudy PM, Windy, Muggy & Warmer |
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Climate
Normal Period |
Climate Record Period |
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1991 -
2020 |
1893 - 2021 |
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September 15, 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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79 |
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67 |
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72 |
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+7 |
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84 |
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in |
1941 |
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59 |
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in |
1970 |
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| Minimum
Temperature |
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67 |
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50 |
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58 |
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+9 |
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70 |
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in |
2005 |
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40 |
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in |
1895 |
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| Average Temperature |
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73 |
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59 |
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65 |
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+8 |
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76 |
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in |
1931 |
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51 |
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in |
1895 |
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| Month Avg Max Temperature |
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76.2 |
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77.1 |
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74.4 |
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+1.8 |
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82.9 |
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in |
1961 |
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68.9 |
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in |
1917 |
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| Month Avg
Min Temperature |
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61.5 |
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60.5 |
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59.5 |
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+1.9 |
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66.6 |
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in |
1961 |
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52.5 |
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in |
1967 |
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| Month Average Temperature |
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69.1 |
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69.1 |
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66.9 |
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+2.2 |
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74.9 |
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in |
1961 |
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61.8 |
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in |
1963 |
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| High Heat
Index |
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83 |
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65 |
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72 |
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+11 |
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85 |
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in |
2008 |
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| Low Wind Chill |
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41 |
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in |
1895 |
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| HDD |
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0 |
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6 |
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2 |
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-2 |
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14 |
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in |
1895 |
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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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9 |
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18 |
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-17 |
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69 |
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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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9 |
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25 |
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-15 |
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95 |
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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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8 |
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0 |
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2 |
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+6 |
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11 |
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in |
1931 |
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0 |
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in |
2020 |
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| Month CDD |
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63 |
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71 |
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47 |
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+16 |
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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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746 |
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837 |
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584 |
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+162 |
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837 |
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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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73 |
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52 |
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63 |
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+10 |
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74 |
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in |
1989 |
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43 |
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in |
1975 |
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| Minimum
Dew Point |
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65 |
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40 |
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53 |
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+12 |
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67 |
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in |
2005 |
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34 |
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in |
1983 |
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| Average Dew Point |
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69 |
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46 |
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58 |
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+11 |
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70 |
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in |
2005 |
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40 |
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in |
1983 |
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| Month Avg Max Dew Point |
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66.9 |
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66.0 |
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64.4 |
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+2.5 |
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70.7 |
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in |
1961 |
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54.9 |
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in |
1967 |
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| Month Avg
Min Dew Point |
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57.5 |
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54.6 |
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55.1 |
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+2.4 |
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62.8 |
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in |
1961 |
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43.7 |
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in |
1967 |
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| Month Average Dew Point |
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62.4 |
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60.5 |
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59.7 |
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+2.7 |
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66.8 |
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in |
1961 |
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49.3 |
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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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.14 |
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-.14 |
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2.26 |
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in |
1966 |
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| One Hour |
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.00 |
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.00 |
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.78 |
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in |
2005 |
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| Hourly Rate |
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.00 |
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.00 |
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3.00 |
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in |
2005 |
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| Month Precipitation |
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7.60 |
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.66 |
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1.77 |
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+5.83 |
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7.60 |
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in |
2021 |
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T |
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in |
1983 |
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| Year Precipitation |
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36.70 |
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24.69 |
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31.05 |
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+5.65 |
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46.34 |
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in |
1998 |
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17.43 |
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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
15, 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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86% |
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94% |
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+3% |
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100% |
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in |
2017 |
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73% |
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in |
1962 |
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| Minimum
Humidity |
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82% |
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50% |
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61% |
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+21% |
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91% |
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in |
2006 |
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34% |
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in |
1983 |
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| Average Humidity |
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90% |
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68% |
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77% |
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+12% |
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95% |
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in |
2006 |
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54% |
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in |
1962 |
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| Maximum Barometer |
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30.07 |
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30.32 |
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30.12 |
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-00.05 |
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30.52 |
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in |
1975 |
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29.71 |
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in |
1990 |
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| Minimum
Barometer |
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29.95 |
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30.20 |
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29.90 |
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+00.05 |
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30.36 |
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in |
1963 |
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29.19 |
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in |
1966 |
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| Average Barometer |
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30.01 |
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30.26 |
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30.01 |
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-00.00 |
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30.41 |
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in |
1963 |
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29.49 |
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in |
1966 |
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| Average Wind |
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9.1 |
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5.3 |
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6.2 |
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+2.9 |
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13.6 |
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in |
1967 |
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1.4 |
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in |
2004 |
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| Direction |
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S |
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NNW |
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SSW |
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N |
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SE |
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| High Wind Gust |
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27 |
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19 |
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21 |
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+6 |
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43 |
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in |
1961 |
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10 |
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in |
2004 |
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| Direction |
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SSW |
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NE |
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SSW |
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S |
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SE |
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| Maximum Water Temp |
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72.5 |
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68.9 |
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68.9 |
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+3.6 |
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72.5 |
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in |
2021 |
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65.3 |
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in |
2006 |
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| Minimum
Water Temp |
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70.3 |
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66.7 |
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66.9 |
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+3.4 |
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70.3 |
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in |
2021 |
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63.3 |
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in |
2001 |
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| Average Water Temp |
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71.4 |
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67.8 |
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67.9 |
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+3.5 |
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71.4 |
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in |
2021 |
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64.4 |
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in |
2001 |
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| Sunrise/ AM Twilight |
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6:24:40 AM |
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5:58:18 AM |
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| Sunset /
PM Twilight |
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6:55:55 PM |
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7:22:17 PM |
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| Length Of Day |
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12:31:15 |
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| Special Conditions |
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Fog, Haze |
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| Comments |
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| Hour-by-Hour Weather For September 15, 2021 |
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| Climate Weather for September 15 |
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| Weather History For September 15 |
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| Weather Calendar |
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| Back
To Weather Stat Page |
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