| Portsmouth Rhode Island
Weather Almanac |
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| Thursday, September 17, 2020 |
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| Mostly Cloudy early, Partly Cloudy Day to Cloudy PM and
Warmer |
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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
17, 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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75 |
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72 |
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71 |
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+4 |
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86 |
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in |
1991 |
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57 |
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in |
1954 |
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| Minimum
Temperature |
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61 |
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55 |
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56 |
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+5 |
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69 |
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in |
1991 |
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43 |
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in |
1948 |
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| Average Temperature |
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68 |
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64 |
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64 |
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+4 |
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78 |
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in |
1991 |
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53 |
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in |
2013 |
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| Precipitation |
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.00 |
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.00 |
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.13 |
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-.13 |
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2.66 |
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in |
1933 |
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| One Hour |
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.00 |
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.00 |
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.76 |
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in |
1995 |
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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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0 |
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1 |
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2 |
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-2 |
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12 |
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in |
2013 |
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0 |
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in |
2020 |
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| CDD |
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3 |
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0 |
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1 |
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+2 |
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13 |
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in |
1991 |
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0 |
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in |
2019 |
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| Maximum Dew Point |
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65 |
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54 |
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60 |
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+5 |
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72 |
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in |
1991 |
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43 |
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in |
2013 |
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| Minimum
Dew Point |
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57 |
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48 |
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51 |
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+6 |
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68 |
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in |
1991 |
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28 |
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in |
1959 |
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| Average Dew Point |
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61 |
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51 |
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55 |
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+6 |
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70 |
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in |
1991 |
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38 |
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in |
1959 |
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| Maximum Humidity |
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94% |
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89% |
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93% |
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+1% |
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100% |
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in |
2017 |
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67% |
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in |
2000 |
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| Minimum
Humidity |
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66% |
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45% |
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61% |
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+5% |
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98% |
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in |
1993 |
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28% |
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in |
1968 |
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| Average Humidity |
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80% |
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67% |
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77% |
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+3% |
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99% |
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in |
1993 |
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54% |
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in |
1950 |
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| Maximum Barometer |
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30.12 |
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30.18 |
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30.16 |
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-00.04 |
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30.55 |
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in |
1986 |
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29.83 |
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in |
1952 |
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| Minimum
Barometer |
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29.97 |
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30.06 |
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29.94 |
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+00.03 |
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30.37 |
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in |
2011 |
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29.18 |
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in |
1999 |
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| Average Barometer |
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30.05 |
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30.12 |
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30.05 |
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-00.00 |
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30.43 |
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in |
2011 |
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29.52 |
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in |
1999 |
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| Average Wind |
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5.7 |
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7.2 |
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5.4 |
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+0.3 |
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18.9 |
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in |
1999 |
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0.9 |
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in |
2006 |
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| Direction |
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SW |
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N |
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N |
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WNW |
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SSE |
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| High Wind Gust |
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22 |
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23 |
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20 |
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+2 |
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50 |
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in |
1999 |
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10 |
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in |
2006 |
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| Direction |
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SW |
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NNW |
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NNE |
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SW |
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S |
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| High
Heat Index |
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76 |
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70 |
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71 |
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+5 |
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96 |
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in |
1991 |
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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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68.7 |
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68.0 |
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68.1 |
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+0.6 |
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71.1 |
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in |
2015 |
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64.8 |
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in |
2013 |
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| Minimum
Water Temp |
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67.5 |
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67.3 |
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66.1 |
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+1.4 |
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69.4 |
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in |
2018 |
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61.8 |
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in |
2013 |
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| Average Water Temp |
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68.1 |
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67.7 |
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67.2 |
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+0.9 |
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70.2 |
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in |
2018 |
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63.3 |
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in |
2013 |
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| Sunrise/ AM Twilight |
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6:28:58 AM |
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6:01:20 AM |
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| Sunset
/ PM Twilight |
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6:49:33 PM |
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7:17:11 PM |
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| Length Of Day |
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12:20:35 |
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| Special Conditions |
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None |
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| Comments |
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September
17, 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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76.6 |
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74.7 |
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73.7 |
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+2.9 |
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81.2 |
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in |
1983 |
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68.1 |
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in |
1917 |
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| Avg
Minimum Temperature |
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60.1 |
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57.7 |
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58.5 |
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+1.5 |
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64.8 |
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in |
1961 |
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52.7 |
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in |
1893 |
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| Average Temperature |
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68.6 |
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66.4 |
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66.1 |
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+2.5 |
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73.1 |
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in |
1961 |
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61.4 |
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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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2.21 |
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-1.55 |
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7.91 |
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in |
1932 |
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.03 |
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in |
1980 |
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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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12 |
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17 |
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25 |
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-13 |
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85 |
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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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74 |
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41 |
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47 |
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+27 |
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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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65.9 |
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64.0 |
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61.8 |
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+4.2 |
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69.0 |
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in |
2018 |
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55.1 |
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in |
1975 |
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| Avg
Minimum Dew Point |
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54.8 |
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53.7 |
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52.7 |
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+2.0 |
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60.9 |
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in |
2018 |
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44.6 |
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in |
1967 |
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| Average Dew Point |
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60.5 |
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59.1 |
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57.3 |
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+3.3 |
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65.2 |
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in |
2018 |
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50.1 |
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in |
1967 |
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September 17, 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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33.83 |
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-9.14 |
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46.35 |
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in |
1998 |
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17.53 |
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in |
1957 |
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| 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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12 |
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17 |
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34 |
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-22 |
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85 |
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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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840 |
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699 |
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545 |
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+295 |
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840 |
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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 17, 2020 |
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| Climate Weather for September 17 |
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| Weather History For September 17 |
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| Weather Calendar |
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| Back To Weather Stat Page |
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