| Portsmouth Rhode Island Weather Almanac |
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| Tuesday,
September 21, 2021 |
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| Partly
Cloudy to Mostly Cloudy PM, Light Winds, Continued Seasonal Temps |
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Climate
Normal Period |
Climate Record Period |
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1991 -
2020 |
1893 - 2021 |
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September 21, 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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77 |
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66 |
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70 |
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+7 |
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88 |
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in |
1914 |
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57 |
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in |
1993 |
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| Minimum
Temperature |
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52 |
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45 |
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56 |
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-4 |
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69 |
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in |
1989 |
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36 |
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in |
1956 |
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| Average Temperature |
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65 |
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56 |
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63 |
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+2 |
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75 |
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in |
1989 |
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48 |
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in |
1956 |
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| Month Avg Max Temperature |
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75.7 |
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74.4 |
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73.5 |
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+2.2 |
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81.1 |
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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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60.8 |
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57.6 |
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58.7 |
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+2.1 |
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63.6 |
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in |
1915 |
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53.0 |
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in |
1984 |
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| Month Average
Temperature |
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68.5 |
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66.3 |
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66.0 |
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+2.5 |
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71.8 |
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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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78 |
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62 |
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71 |
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+7 |
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84 |
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in |
1989 |
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| Low Wind Chill |
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32 |
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in |
1956 |
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| HDD |
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0 |
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9 |
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3 |
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-3 |
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17 |
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in |
1956 |
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0 |
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in |
2021 |
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| Month HDD |
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2 |
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46 |
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35 |
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-33 |
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96 |
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in |
1956 |
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0 |
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in |
1971 |
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| Season HDD |
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11 |
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46 |
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42 |
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-31 |
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127 |
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in |
1956 |
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4 |
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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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10 |
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in |
1989 |
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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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57 |
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+19 |
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158 |
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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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594 |
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+165 |
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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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67 |
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45 |
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62 |
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+5 |
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71 |
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in |
2014 |
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37 |
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in |
1962 |
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| Minimum
Dew Point |
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50 |
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35 |
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51 |
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-1 |
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68 |
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in |
1989 |
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28 |
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in |
1962 |
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| Average Dew Point |
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59 |
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40 |
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56 |
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+3 |
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69 |
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in |
1989 |
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33 |
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in |
1962 |
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| Month Avg Max Dew Point |
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67.0 |
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62.4 |
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63.8 |
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+3.3 |
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68.5 |
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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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57.1 |
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50.6 |
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54.2 |
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+2.9 |
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60.3 |
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in |
2018 |
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44.2 |
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in |
1984 |
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| Month Average Dew Point |
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62.3 |
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56.7 |
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58.9 |
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+3.4 |
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64.6 |
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in |
2018 |
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49.5 |
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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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6.52 |
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in |
1961 |
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| One Hour |
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.00 |
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.00 |
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.80 |
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in |
1961 |
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| Hourly Rate |
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.00 |
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.00 |
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1.42 |
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in |
2011 |
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| Month Precipitation |
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8.56 |
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.66 |
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2.58 |
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+5.98 |
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9.58 |
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in |
1960 |
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.10 |
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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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31.86 |
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+5.80 |
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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
21, 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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98% |
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79% |
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93% |
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+5% |
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100% |
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in |
2016 |
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67% |
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in |
1984 |
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| Minimum
Humidity |
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59% |
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32% |
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61% |
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-2% |
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93% |
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in |
1986 |
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32% |
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in |
2020 |
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| Average Humidity |
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79% |
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56% |
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77% |
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+2% |
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97% |
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in |
1986 |
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51% |
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in |
1984 |
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| Maximum Barometer |
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30.41 |
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30.56 |
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30.14 |
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+00.27 |
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30.56 |
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in |
2020 |
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29.62 |
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in |
1976 |
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| Minimum
Barometer |
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30.28 |
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30.34 |
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29.92 |
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+00.36 |
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30.34 |
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in |
2020 |
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28.77 |
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in |
1938 |
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| Average Barometer |
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30.35 |
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30.45 |
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30.03 |
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+00.31 |
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30.45 |
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in |
2020 |
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29.50 |
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in |
1976 |
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| Average Wind |
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3.3 |
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8.2 |
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6.2 |
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-2.9 |
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22.5 |
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in |
1961 |
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1.2 |
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in |
1994 |
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| Direction |
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ENE |
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NE |
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SSW |
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NNE |
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WSW |
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| High Wind Gust |
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16 |
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29 |
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21 |
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-5 |
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116 |
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in |
1938 |
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9 |
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in |
1994 |
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| Direction |
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S |
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NE |
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SSW |
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SE |
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SSE |
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| Maximum Water Temp |
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71.1 |
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65.1 |
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68.0 |
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+3.1 |
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71.2 |
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in |
2021 |
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65.1 |
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in |
2020 |
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| Minimum
Water Temp |
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69.1 |
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63.7 |
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66.0 |
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+3.1 |
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69.1 |
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in |
2021 |
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63.7 |
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in |
2020 |
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| Average Water Temp |
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70.1 |
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64.4 |
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67.0 |
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+3.1 |
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70.1 |
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in |
2021 |
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64.4 |
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in |
2020 |
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| Sunrise/ AM Twilight |
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6:30:47 AM |
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6:04:33 AM |
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| Sunset /
PM Twilight |
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6:45:32 PM |
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7:11:46 PM |
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| Length Of Day |
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12:14:45 |
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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 21, 2021 |
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| Climate Weather for September 21 |
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| Weather History For September 21 |
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| Weather Calendar |
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| Back
To Weather Stat Page |
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