| Portsmouth Rhode Island Weather Almanac |
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| Wednesday,
September 29, 2021 |
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| Partly
Cloudy to Mostly Cloudy PM, Much Cooler |
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Climate
Normal Period |
Climate Record Period |
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1991 -
2020 |
1893 - 2021 |
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September 29, 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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65 |
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74 |
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68 |
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-3 |
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80 |
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in |
1952 |
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55 |
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in |
1936 |
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| Minimum
Temperature |
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52 |
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64 |
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54 |
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-2 |
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66 |
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in |
2015 |
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35 |
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in |
1957 |
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| Average Temperature |
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59 |
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69 |
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61 |
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-2 |
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73 |
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in |
1959 |
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46 |
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in |
1914 |
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| Month Avg Max Temperature |
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75.2 |
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74.6 |
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72.3 |
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+3.0 |
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78.2 |
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in |
1961 |
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67.7 |
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in |
1963 |
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| Month Avg
Min Temperature |
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60.7 |
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57.8 |
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57.6 |
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+3.1 |
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62.8 |
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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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68.2 |
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66.4 |
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64.9 |
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+3.3 |
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70.7 |
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in |
1961 |
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60.3 |
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in |
1963 |
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| High
Heat Index |
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64 |
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75 |
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68 |
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-4 |
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82 |
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in |
1959 |
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| Low Wind Chill |
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32 |
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in |
1914 |
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| HDD |
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6 |
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0 |
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5 |
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+1 |
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19 |
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in |
1914 |
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0 |
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in |
2020 |
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| Month HDD |
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9 |
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56 |
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68 |
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-59 |
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172 |
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in |
1956 |
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9 |
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in |
2021 |
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| Season HDD |
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18 |
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56 |
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75 |
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-57 |
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203 |
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in |
1956 |
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18 |
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in |
2021 |
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| CDD |
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0 |
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4 |
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1 |
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-1 |
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8 |
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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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98 |
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65 |
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+38 |
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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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864 |
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602 |
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+184 |
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864 |
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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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57 |
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70 |
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60 |
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-3 |
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71 |
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in |
2015 |
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33 |
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in |
1981 |
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| Minimum
Dew Point |
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45 |
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63 |
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49 |
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-4 |
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66 |
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in |
1959 |
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26 |
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in |
1981 |
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| Average Dew Point |
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51 |
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67 |
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54 |
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-3 |
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68 |
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in |
2015 |
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30 |
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in |
1981 |
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| Month Avg Max Dew Point |
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66.9 |
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62.4 |
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62.9 |
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+4.0 |
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67.2 |
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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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56.9 |
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51.4 |
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53.0 |
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+3.9 |
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57.9 |
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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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62.1 |
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57.1 |
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57.9 |
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+4.2 |
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62.9 |
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in |
2018 |
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49.6 |
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in |
1984 |
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| Precipitation |
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.00 |
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T |
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.14 |
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-.14 |
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2.82 |
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in |
2004 |
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| One Hour |
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.00 |
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T |
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.58 |
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in |
1974 |
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| Hourly Rate |
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.00 |
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.00 |
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3.03 |
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in |
2006 |
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| Month Precipitation |
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9.99 |
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.93 |
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3.66 |
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+6.33 |
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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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32.94 |
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+6.15 |
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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
29, 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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90% |
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98% |
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92% |
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-2% |
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100% |
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in |
2006 |
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68% |
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in |
1981 |
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| Minimum
Humidity |
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51% |
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82% |
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59% |
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-8% |
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92% |
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in |
2011 |
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29% |
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in |
1957 |
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| Average Humidity |
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71% |
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90% |
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75% |
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-5% |
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95% |
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in |
2012 |
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49% |
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in |
1957 |
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| Maximum Barometer |
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29.99 |
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29.97 |
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30.13 |
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-00.14 |
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30.57 |
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in |
1988 |
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29.61 |
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in |
1966 |
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| Minimum
Barometer |
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29.83 |
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29.77 |
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29.88 |
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-00.05 |
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30.30 |
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in |
2000 |
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29.18 |
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in |
1963 |
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| Average Barometer |
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29.91 |
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29.87 |
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30.01 |
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-00.10 |
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30.39 |
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in |
1988 |
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29.49 |
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in |
1997 |
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| Average Wind |
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6.8 |
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6.4 |
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6.6 |
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+0.2 |
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16.5 |
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in |
2001 |
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3.0 |
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in |
1965 |
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| Direction |
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N |
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S |
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N |
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NNE |
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NNW |
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| High Wind Gust |
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22 |
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22 |
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23 |
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-1 |
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38 |
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in |
1989 |
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13 |
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in |
2018 |
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| Direction |
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NNW |
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SSE |
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NNE |
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SW |
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NW |
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| Maximum Water Temp |
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69.6 |
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67.3 |
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66.2 |
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+3.4 |
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69.6 |
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in |
2021 |
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63.0 |
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in |
2010 |
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| Minimum
Water Temp |
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67.5 |
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66.2 |
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64.6 |
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+2.9 |
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67.5 |
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in |
2021 |
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#N/A |
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in |
2004 |
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| Average Water Temp |
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68.6 |
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66.8 |
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65.4 |
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+3.1 |
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68.6 |
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in |
2021 |
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61.7 |
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in |
2000 |
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| Sunrise/ AM Twilight |
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6:39:03 AM |
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6:12:52 AM |
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| Sunset /
PM Twilight |
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6:31:47 PM |
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6:57:57 PM |
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| Length Of Day |
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11:52:44 |
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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 29, 2021 |
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| Climate Weather for September 29 |
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| Weather History For September 29 |
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| Weather Calendar |
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| Back
To Weather Stat Page |
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