| Portsmouth Rhode Island Weather Almanac |
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| Monday,
September 20, 2021 |
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| Clear,
Seasonal Temperatures, Very Pleasant |
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Climate
Normal Period |
Climate Record Period |
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1991 -
2020 |
1893 - 2021 |
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September 20, 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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63 |
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71 |
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+4 |
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85 |
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in |
1983 |
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59 |
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in |
1993 |
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| Minimum
Temperature |
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53 |
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44 |
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56 |
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-3 |
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69 |
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in |
1938 |
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38 |
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in |
1979 |
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| Average Temperature |
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64 |
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54 |
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63 |
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+1 |
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76 |
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in |
1983 |
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50 |
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in |
1979 |
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| Month Avg Max Temperature |
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75.6 |
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74.9 |
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73.7 |
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+1.9 |
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81.3 |
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in |
1983 |
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68.4 |
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in |
1913 |
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| Month Avg
Min Temperature |
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61.3 |
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58.2 |
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58.8 |
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+2.5 |
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64.0 |
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in |
1915 |
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52.9 |
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in |
1984 |
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| Month Average
Temperature |
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68.7 |
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66.9 |
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66.2 |
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+2.5 |
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72.0 |
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in |
1961 |
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61.8 |
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in |
1913 |
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| High
Heat Index |
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76 |
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60 |
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71 |
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+5 |
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88 |
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in |
1983 |
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| Low Wind Chill |
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37 |
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in |
1979 |
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| HDD |
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1 |
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11 |
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3 |
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-2 |
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15 |
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in |
1979 |
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0 |
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in |
2017 |
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| Month HDD |
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2 |
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37 |
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32 |
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-30 |
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95 |
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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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11 |
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37 |
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39 |
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-28 |
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110 |
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in |
1956 |
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0 |
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in |
2015 |
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| CDD |
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0 |
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0 |
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1 |
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-1 |
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11 |
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in |
1983 |
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0 |
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in |
2021 |
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| Month CDD |
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76 |
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74 |
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56 |
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+20 |
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155 |
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in |
1961 |
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7 |
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in |
1893 |
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| Year CDD |
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759 |
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840 |
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593 |
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+166 |
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840 |
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in |
2020 |
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282 |
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in |
1902 |
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| Maximum Dew Point |
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62 |
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41 |
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62 |
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+0 |
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74 |
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in |
1989 |
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38 |
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in |
1993 |
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| Minimum
Dew Point |
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50 |
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29 |
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52 |
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-2 |
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66 |
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in |
2016 |
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26 |
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in |
1993 |
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| Average Dew Point |
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56 |
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35 |
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57 |
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-1 |
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69 |
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in |
2016 |
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32 |
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in |
1993 |
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| Month Avg Max Dew Point |
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67.1 |
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63.3 |
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63.9 |
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+3.2 |
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68.7 |
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in |
2018 |
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54.9 |
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in |
1984 |
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| Month Avg
Min Dew Point |
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57.5 |
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51.4 |
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54.4 |
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+3.1 |
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60.7 |
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in |
2018 |
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44.5 |
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in |
1984 |
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| Month Average Dew Point |
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62.5 |
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57.5 |
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59.1 |
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+3.4 |
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64.9 |
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in |
2018 |
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49.7 |
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in |
1984 |
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| Precipitation |
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.00 |
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.00 |
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.13 |
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-.13 |
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7.81 |
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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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1.65 |
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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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1.48 |
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in |
2006 |
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| Month Precipitation |
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8.56 |
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.66 |
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2.45 |
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+6.11 |
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9.57 |
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in |
1960 |
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.06 |
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in |
1946 |
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| Year Precipitation |
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37.66 |
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24.69 |
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31.73 |
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+5.93 |
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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
20, 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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96% |
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72% |
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94% |
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+2% |
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100% |
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in |
2017 |
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66% |
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in |
1993 |
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| Minimum
Humidity |
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51% |
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32% |
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61% |
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-10% |
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91% |
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in |
1988 |
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32% |
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in |
2020 |
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| Average Humidity |
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74% |
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52% |
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77% |
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-4% |
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96% |
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in |
1988 |
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50% |
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in |
1993 |
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| Maximum Barometer |
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30.40 |
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30.55 |
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30.15 |
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+00.25 |
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30.55 |
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in |
2020 |
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29.61 |
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in |
1954 |
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| Minimum
Barometer |
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30.25 |
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30.38 |
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29.94 |
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+00.31 |
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30.38 |
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in |
2020 |
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29.39 |
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in |
1955 |
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| Average Barometer |
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30.33 |
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30.47 |
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30.04 |
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+00.28 |
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30.47 |
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in |
2020 |
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29.56 |
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in |
1955 |
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| Average Wind |
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2.9 |
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7.9 |
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6.4 |
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-3.5 |
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18.7 |
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in |
2017 |
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2.0 |
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in |
2016 |
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| Direction |
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ENE |
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NNE |
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SSW |
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NNE |
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SSW |
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| High Wind Gust |
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15 |
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30 |
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21 |
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-6 |
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41 |
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in |
1984 |
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9 |
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in |
2016 |
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| Direction |
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SSW |
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N |
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SSW |
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SW |
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NNW |
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| Maximum Water Temp |
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70.9 |
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65.5 |
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68.0 |
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+2.9 |
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71.5 |
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in |
2003 |
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65.5 |
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in |
2020 |
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| Minimum
Water Temp |
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69.3 |
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64.4 |
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65.8 |
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+3.5 |
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69.3 |
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in |
2021 |
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63.1 |
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in |
2004 |
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| Average Water Temp |
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70.1 |
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65.0 |
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66.9 |
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+3.2 |
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70.1 |
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in |
2021 |
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64.4 |
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in |
2004 |
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| Sunrise/ AM Twilight |
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6:29:46 AM |
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6:03:31 AM |
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| Sunset /
PM Twilight |
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6:47:16 PM |
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7:13:31 PM |
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| Length Of Day |
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12:17:30 |
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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 20, 2021 |
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| Climate Weather for September 20 |
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| Weather History For September 20 |
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| Weather Calendar |
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| Back
To Weather Stat Page |
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