| Portsmouth Rhode Island
Weather Almanac |
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| Tuesday, September 15, 2020 |
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| Clear, Afternoon Filtered Sunshine from Fires on West Coast,
Much Cooler |
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| Climate
Normal Period |
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Climate Record Period |
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| 1981- 2010 |
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1893 - 2020 |
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September
15, 2020 |
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Record |
Record |
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| Observed Daily Data |
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Observed |
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2019 |
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Normal |
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Depart |
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Highest |
Lowest |
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| Maximum Temperature |
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67 |
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80 |
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72 |
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-5 |
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84 |
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in |
1941 |
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59 |
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in |
1970 |
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| Minimum
Temperature |
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50 |
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62 |
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57 |
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-7 |
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70 |
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in |
2005 |
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40 |
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in |
1895 |
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| Average Temperature |
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59 |
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71 |
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64 |
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-5 |
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76 |
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in |
1931 |
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51 |
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in |
1895 |
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| Precipitation |
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.00 |
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.05 |
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.13 |
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-.13 |
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2.26 |
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in |
1966 |
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| One Hour |
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.00 |
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.03 |
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.78 |
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in |
2005 |
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| Snow |
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#N/A |
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0.0 |
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0.0 |
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#N/A |
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0.0 |
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in |
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| Snow Depth |
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#N/A |
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0 |
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0 |
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in |
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| HDD |
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6 |
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0 |
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2 |
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+4 |
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14 |
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in |
1895 |
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0 |
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in |
2019 |
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| CDD |
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0 |
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6 |
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1 |
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-1 |
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11 |
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in |
1931 |
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0 |
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in |
2020 |
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| Maximum Dew Point |
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52 |
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67 |
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60 |
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-8 |
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74 |
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in |
1989 |
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43 |
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in |
1975 |
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| Minimum
Dew Point |
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40 |
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59 |
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51 |
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-11 |
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67 |
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in |
2005 |
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34 |
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in |
1983 |
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| Average Dew Point |
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46 |
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63 |
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56 |
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-10 |
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70 |
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in |
2005 |
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40 |
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in |
1983 |
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| Maximum Humidity |
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86% |
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96% |
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94% |
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-8% |
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100% |
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in |
2017 |
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73% |
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in |
1962 |
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| Minimum
Humidity |
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50% |
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57% |
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61% |
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-11% |
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91% |
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in |
2006 |
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34% |
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in |
1983 |
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| Average Humidity |
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68% |
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77% |
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77% |
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-9% |
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95% |
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in |
2006 |
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54% |
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in |
1962 |
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| Maximum Barometer |
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30.32 |
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30.18 |
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30.12 |
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+00.20 |
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30.52 |
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in |
1975 |
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29.71 |
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in |
1990 |
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| Minimum
Barometer |
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30.20 |
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30.05 |
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29.90 |
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+00.30 |
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30.36 |
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in |
1963 |
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29.19 |
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in |
1966 |
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| Average Barometer |
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30.26 |
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30.12 |
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30.01 |
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+00.25 |
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30.41 |
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in |
1963 |
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29.49 |
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in |
1966 |
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| Average Wind |
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5.3 |
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4.4 |
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6.1 |
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-0.8 |
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13.6 |
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in |
1967 |
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1.4 |
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in |
2004 |
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| Direction |
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NNW |
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SSW |
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SSW |
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N |
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SE |
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| High Wind Gust |
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19 |
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17 |
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21 |
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-2 |
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43 |
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in |
1961 |
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10 |
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in |
2004 |
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| Direction |
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NE |
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NW |
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SSW |
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S |
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SE |
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| High
Heat Index |
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65 |
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81 |
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72 |
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-7 |
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85 |
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in |
2008 |
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| Wind Chill |
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#N/A |
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in |
#N/A |
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| Maximum Water Temp |
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68.9 |
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68.7 |
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68.8 |
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+0.1 |
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71.4 |
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in |
2011 |
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65.3 |
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in |
2006 |
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| Minimum
Water Temp |
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66.7 |
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68.0 |
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66.7 |
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-0.0 |
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69.8 |
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in |
1999 |
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63.3 |
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in |
2001 |
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| Average Water Temp |
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67.8 |
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68.4 |
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67.8 |
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+0.0 |
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70.5 |
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in |
1999 |
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64.4 |
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in |
2001 |
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| Sunrise/ AM Twilight |
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6:26:56 AM |
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5:59:15 AM |
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| Sunset
/ PM Twilight |
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6:53:01 PM |
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7:20:41 PM |
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| Length Of Day |
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12:26:05 |
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| Special Conditions |
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Haze, Smoke from western states fires |
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| Comments |
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September
15, 2020 |
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Record |
Record |
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| Month-to-Date Summary |
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Observed |
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2019 |
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Normal |
Depart |
Highest |
Lowest |
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| Avg Maximum Temperature |
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77.1 |
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74.8 |
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74.0 |
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+3.1 |
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82.9 |
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in |
1961 |
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68.9 |
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in |
1917 |
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| Avg
Minimum Temperature |
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60.5 |
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57.9 |
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58.9 |
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+1.7 |
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66.6 |
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in |
1961 |
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52.5 |
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in |
1967 |
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| Average Temperature |
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69.1 |
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66.5 |
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66.4 |
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+2.7 |
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74.9 |
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in |
1961 |
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61.8 |
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in |
1963 |
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| Total
Precipitation |
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.66 |
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.64 |
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1.75 |
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-1.09 |
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5.18 |
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in |
1944 |
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T |
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in |
1983 |
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| Total Snow |
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0.0 |
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0.0 |
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0.0 |
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+0.0 |
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0.0 |
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in |
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0.0 |
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in |
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| Total
HDD |
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9 |
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16 |
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21 |
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-12 |
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69 |
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in |
1913 |
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0 |
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in |
2015 |
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| Total CDD |
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71 |
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39 |
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45 |
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+26 |
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148 |
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in |
1961 |
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7 |
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in |
1975 |
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| Avg Maximum Dew Point |
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66.3 |
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64.8 |
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62.0 |
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+4.3 |
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70.7 |
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in |
1961 |
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54.9 |
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in |
1967 |
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| Avg
Minimum Dew Point |
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55.0 |
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54.2 |
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53.0 |
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+2.0 |
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62.8 |
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in |
1961 |
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43.7 |
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in |
1967 |
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| Average Dew Point |
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60.9 |
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59.7 |
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57.5 |
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+3.3 |
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66.8 |
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in |
1961 |
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49.3 |
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in |
1967 |
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September 15, 2020 |
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Record |
Record |
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| Year-to-Date Summary |
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Observed |
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2019 |
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Normal |
Depart |
Highest |
Lowest |
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| Total Precipitation |
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24.69 |
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38.47 |
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33.57 |
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-8.88 |
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46.34 |
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in |
1998 |
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17.43 |
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in |
1957 |
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| Total
Snow (since Jul 1 20) |
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0.0 |
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0.0 |
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0.0 |
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+0.0 |
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0.0 |
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in |
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0.0 |
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in |
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| Total HDD (since Jul 1
20) |
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9 |
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16 |
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30 |
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-21 |
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69 |
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in |
1913 |
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0 |
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in |
2015 |
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| Total
CDD (since Jan 1) |
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837 |
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697 |
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543 |
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+294 |
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837 |
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in |
2020 |
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280 |
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in |
1902 |
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| Hour-by-Hour Weather For September 15, 2020 |
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| Climate Weather for September 15 |
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| Weather History For September 15 |
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| Weather Calendar |
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| Back To Weather Stat Page |
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