| Portsmouth Rhode Island Weather Almanac |
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| Thursday,
September 30, 2021 |
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| Cloudy,
Light Rain Shower then Partly Cloudy and Cooler |
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Climate
Normal Period |
Climate Record Period |
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1991 -
2020 |
1893 - 2021 |
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September 30, 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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63 |
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73 |
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68 |
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-5 |
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81 |
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in |
1922 |
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51 |
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in |
1992 |
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| Minimum
Temperature |
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52 |
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62 |
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53 |
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-1 |
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66 |
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in |
2010 |
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35 |
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in |
1951 |
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| Average Temperature |
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58 |
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68 |
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61 |
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-3 |
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72 |
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in |
1959 |
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45 |
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in |
1992 |
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| Month Avg Max Temperature |
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74.8 |
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74.5 |
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72.1 |
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+2.7 |
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77.8 |
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in |
1961 |
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67.6 |
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in |
1963 |
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| Month Avg
Min Temperature |
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60.4 |
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57.9 |
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57.4 |
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+2.9 |
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62.2 |
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in |
1961 |
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51.7 |
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in |
1956 |
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| Month Average
Temperature |
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67.9 |
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66.5 |
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64.8 |
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+3.1 |
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70.2 |
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in |
1961 |
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60.2 |
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in |
1963 |
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| High
Heat Index |
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61 |
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74 |
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67 |
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-6 |
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81 |
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in |
1952 |
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| Low Wind Chill |
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32 |
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in |
1951 |
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| HDD |
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7 |
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0 |
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5 |
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+2 |
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20 |
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in |
1992 |
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0 |
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in |
2020 |
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| Month HDD |
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16 |
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56 |
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73 |
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-57 |
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181 |
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in |
1956 |
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12 |
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in |
1921 |
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| Season HDD |
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25 |
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56 |
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80 |
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-55 |
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212 |
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in |
1956 |
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19 |
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in |
1921 |
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| CDD |
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0 |
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3 |
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1 |
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-1 |
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7 |
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in |
1959 |
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0 |
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in |
2021 |
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| Month CDD |
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103 |
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101 |
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66 |
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+37 |
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186 |
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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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786 |
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867 |
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603 |
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+183 |
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867 |
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in |
2020 |
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288 |
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in |
1902 |
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| Maximum Dew Point |
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50 |
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70 |
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60 |
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-10 |
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72 |
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in |
2015 |
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31 |
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in |
1981 |
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| Minimum
Dew Point |
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45 |
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53 |
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48 |
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-3 |
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65 |
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in |
2010 |
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20 |
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in |
1981 |
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| Average Dew Point |
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48 |
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62 |
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54 |
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-6 |
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68 |
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in |
2010 |
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26 |
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in |
1981 |
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| Month Avg Max Dew Point |
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66.3 |
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62.7 |
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62.8 |
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+3.5 |
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66.8 |
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in |
2018 |
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54.6 |
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in |
1984 |
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| Month Avg
Min Dew Point |
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56.5 |
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51.4 |
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52.9 |
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+3.7 |
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57.6 |
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in |
2018 |
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44.1 |
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in |
1984 |
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| Month Average Dew Point |
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61.6 |
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57.3 |
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57.8 |
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+3.8 |
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62.5 |
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in |
2018 |
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49.4 |
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in |
1984 |
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| Precipitation |
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.01 |
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.30 |
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.14 |
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-.13 |
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1.84 |
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in |
2015 |
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| One Hour |
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.01 |
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.20 |
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.84 |
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in |
2015 |
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| Hourly Rate |
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.00 |
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2.70 |
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3.08 |
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in |
2015 |
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| Month Precipitation |
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10.00 |
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1.23 |
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3.80 |
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+6.20 |
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10.67 |
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in |
1961 |
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.31 |
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in |
1959 |
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| Year Precipitation |
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39.10 |
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25.26 |
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33.08 |
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+6.02 |
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48.49 |
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in |
1998 |
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17.64 |
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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
30, 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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91% |
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97% |
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93% |
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-2% |
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100% |
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in |
2010 |
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67% |
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in |
1981 |
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| Minimum
Humidity |
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55% |
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55% |
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58% |
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-3% |
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93% |
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in |
2014 |
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25% |
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in |
1981 |
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| Average Humidity |
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73% |
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76% |
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75% |
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-2% |
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95% |
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in |
2014 |
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46% |
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in |
1981 |
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| Maximum Barometer |
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30.12 |
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29.89 |
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30.13 |
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-00.01 |
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30.59 |
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in |
1945 |
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29.53 |
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in |
1997 |
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| Minimum
Barometer |
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29.98 |
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29.52 |
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29.91 |
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+00.07 |
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30.38 |
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in |
2007 |
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29.29 |
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in |
1972 |
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| Average Barometer |
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30.05 |
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29.71 |
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30.02 |
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+00.03 |
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30.46 |
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in |
2007 |
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29.43 |
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in |
1997 |
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| Average Wind |
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6.3 |
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13.7 |
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6.7 |
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-0.4 |
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18.7 |
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in |
2001 |
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2.5 |
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in |
2008 |
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| Direction |
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NNW |
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SW |
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SW |
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NNE |
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SE |
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| High Wind Gust |
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26 |
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51 |
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22 |
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+4 |
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51 |
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in |
2020 |
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11 |
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in |
1970 |
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| Direction |
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NNW |
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S |
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S |
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S |
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WNW |
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| Maximum Water Temp |
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67.8 |
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67.3 |
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65.8 |
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+2.0 |
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68.5 |
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in |
2015 |
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62.0 |
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in |
2010 |
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| Minimum
Water Temp |
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66.7 |
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66.4 |
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64.2 |
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+2.5 |
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67.5 |
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in |
2015 |
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60.3 |
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in |
2001 |
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| Average Water Temp |
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67.3 |
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66.9 |
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65.0 |
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+2.2 |
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68.0 |
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in |
2015 |
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61.3 |
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in |
2001 |
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| Sunrise/ AM Twilight |
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6:40:06 AM |
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6:13:55 AM |
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| Sunset /
PM Twilight |
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6:30:05 PM |
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6:56:15 PM |
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| Length Of Day |
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11:49:59 |
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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 30, 2021 |
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| Climate Weather for September 30 |
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| Weather History For September 30 |
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| Weather Calendar |
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| Back
To Weather Stat Page |
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