| Portsmouth Rhode Island Weather Almanac |
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| Tuesday,
September 28, 2021 |
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| Clear early,
Mostly Cloudy Day, Heavy Rain/Thunderstorms, Cloudy PM, Much Warmer |
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Climate
Normal Period |
Climate Record Period |
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1991 -
2020 |
1893 - 2021 |
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September 28, 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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76 |
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72 |
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68 |
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+8 |
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80 |
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in |
2017 |
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55 |
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in |
1914 |
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| Minimum
Temperature |
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60 |
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65 |
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54 |
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+6 |
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67 |
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in |
2010 |
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35 |
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in |
1980 |
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| Average Temperature |
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68 |
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69 |
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61 |
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+7 |
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71 |
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in |
1961 |
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46 |
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in |
1965 |
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| Month Avg Max Temperature |
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75.6 |
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74.6 |
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72.4 |
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+3.2 |
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78.6 |
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in |
1961 |
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67.8 |
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in |
1963 |
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| Month Avg
Min Temperature |
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61.0 |
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57.5 |
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57.7 |
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+3.3 |
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63.3 |
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in |
1961 |
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52.0 |
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in |
1956 |
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| Month Average
Temperature |
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68.6 |
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66.4 |
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65.1 |
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+3.5 |
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71.1 |
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in |
1961 |
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60.4 |
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in |
1963 |
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| High
Heat Index |
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77 |
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74 |
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70 |
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+7 |
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81 |
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in |
2017 |
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| Low Wind Chill |
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33 |
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in |
1980 |
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| HDD |
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0 |
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0 |
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5 |
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-5 |
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19 |
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in |
1965 |
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0 |
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in |
2021 |
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| Month HDD |
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3 |
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56 |
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63 |
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-60 |
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167 |
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in |
1956 |
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3 |
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in |
2021 |
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| Season HDD |
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12 |
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56 |
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70 |
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-58 |
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198 |
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in |
1956 |
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12 |
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in |
2021 |
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| CDD |
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3 |
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4 |
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1 |
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+2 |
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6 |
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in |
1961 |
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0 |
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in |
2018 |
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| Month CDD |
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103 |
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94 |
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64 |
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+39 |
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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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860 |
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601 |
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+185 |
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860 |
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in |
2020 |
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287 |
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in |
1902 |
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| Maximum Dew Point |
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66 |
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69 |
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60 |
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+6 |
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72 |
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in |
2017 |
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31 |
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in |
1957 |
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| Minimum
Dew Point |
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56 |
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64 |
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49 |
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+7 |
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66 |
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in |
2010 |
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22 |
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in |
1957 |
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| Average Dew Point |
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61 |
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67 |
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55 |
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+6 |
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68 |
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in |
2010 |
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27 |
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in |
1957 |
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| Month Avg Max Dew Point |
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67.2 |
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62.2 |
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63.0 |
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+4.2 |
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67.4 |
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in |
2018 |
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54.8 |
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in |
1966 |
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| Month Avg
Min Dew Point |
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57.4 |
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51.0 |
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53.2 |
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+4.2 |
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58.1 |
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in |
2018 |
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44.3 |
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in |
1984 |
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| Month Average Dew Point |
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62.5 |
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56.8 |
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58.1 |
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+4.4 |
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63.1 |
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in |
2018 |
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49.8 |
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in |
1984 |
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| Precipitation |
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.54 |
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.27 |
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.14 |
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+.40 |
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1.85 |
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in |
1958 |
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| One Hour |
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.28 |
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.20 |
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.73 |
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in |
2018 |
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| Hourly Rate |
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3.81 |
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2.19 |
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3.81 |
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in |
2021 |
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| Month Precipitation |
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9.99 |
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.93 |
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3.52 |
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+6.47 |
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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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39.09 |
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24.96 |
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32.80 |
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+6.29 |
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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
28, 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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98% |
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93% |
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+4% |
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100% |
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in |
2017 |
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59% |
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in |
1957 |
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| Minimum
Humidity |
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72% |
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87% |
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59% |
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+13% |
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96% |
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in |
2004 |
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24% |
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in |
1957 |
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| Average Humidity |
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85% |
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93% |
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76% |
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+9% |
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98% |
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in |
2004 |
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42% |
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in |
1957 |
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| Maximum Barometer |
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29.86 |
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30.00 |
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30.11 |
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-00.25 |
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30.46 |
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in |
1985 |
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29.62 |
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in |
2009 |
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| Minimum
Barometer |
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29.75 |
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29.94 |
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29.88 |
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-00.13 |
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30.28 |
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in |
1950 |
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29.45 |
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in |
2009 |
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| Average Barometer |
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29.81 |
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29.97 |
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30.00 |
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-00.19 |
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30.35 |
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in |
1950 |
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29.54 |
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in |
2009 |
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| Average Wind |
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6.5 |
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6.0 |
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6.4 |
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+0.1 |
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14.3 |
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in |
1956 |
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0.9 |
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in |
1965 |
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| Direction |
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SW |
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S |
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S |
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NNE |
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NNW |
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| High Wind Gust |
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23 |
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18 |
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22 |
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+1 |
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44 |
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in |
1985 |
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10 |
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in |
2015 |
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| Direction |
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WSW |
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S |
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S |
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SW |
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SE |
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| Maximum Water Temp |
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70.2 |
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67.5 |
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66.9 |
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+3.3 |
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70.2 |
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in |
2021 |
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62.9 |
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in |
2010 |
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| Minimum
Water Temp |
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69.4 |
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66.0 |
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65.1 |
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+4.3 |
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69.4 |
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in |
2021 |
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61.1 |
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in |
2010 |
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| Average Water Temp |
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69.8 |
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66.8 |
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66.0 |
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+3.8 |
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69.8 |
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in |
2021 |
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62.0 |
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in |
2010 |
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| Sunrise/ AM Twilight |
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6:38:00 AM |
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6:11:50 AM |
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| Sunset /
PM Twilight |
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6:33:29 PM |
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6:59:40 PM |
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| Length Of Day |
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11:55:29 |
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| Special Conditions |
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Fog, Heavy Thunderstorm |
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| Comments |
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| Hour-by-Hour Weather For September 28, 2021 |
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| Climate Weather for September 28 |
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| Weather History For September 28 |
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| Weather Calendar |
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| Back
To Weather Stat Page |
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