| Portsmouth Rhode Island
Weather Almanac |
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| Thursday, December 31, 2020 |
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| Cloudy, Morning Rain and Fog, Clearing Late, Much 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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December
31, 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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49 |
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42 |
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39 |
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+10 |
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57 |
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in |
1936 |
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9 |
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in |
1962 |
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| Minimum
Temperature |
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34 |
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37 |
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24 |
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+10 |
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42 |
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in |
1965 |
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-5 |
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in |
1917 |
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| Average Temperature |
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42 |
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40 |
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32 |
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+10 |
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48 |
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in |
1936 |
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3 |
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in |
1962 |
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| Precipitation |
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.31 |
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.12 |
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.12 |
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+.19 |
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1.37 |
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in |
1906 |
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| One
Hour |
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.09 |
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.03 |
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.18 |
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in |
1989 |
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| Snow |
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0.0 |
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0.0 |
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0.2 |
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-0.2 |
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5.1 |
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in |
2008 |
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| Snow
Depth |
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0 |
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0 |
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15 |
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in |
1947 |
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| HDD |
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23 |
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25 |
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33 |
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-10 |
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62 |
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in |
1962 |
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17 |
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in |
1936 |
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| CDD |
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0 |
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0 |
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0 |
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+0 |
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0 |
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in |
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0 |
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in |
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| Maximum Dew Point |
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48 |
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40 |
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30 |
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+18 |
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51 |
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in |
1990 |
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-5 |
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in |
1962 |
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| Minimum
Dew Point |
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26 |
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35 |
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14 |
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+12 |
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35 |
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in |
2019 |
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-18 |
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in |
1962 |
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| Average Dew Point |
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37 |
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38 |
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22 |
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+15 |
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41 |
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in |
1992 |
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-12 |
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in |
1962 |
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| Maximum Humidity |
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96% |
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96% |
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85% |
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+11% |
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100% |
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in |
2002 |
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57% |
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in |
1955 |
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| Minimum
Humidity |
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65% |
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81% |
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54% |
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+11% |
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94% |
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in |
1989 |
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22% |
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in |
1991 |
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| Average Humidity |
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81% |
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89% |
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69% |
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+11% |
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97% |
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in |
1989 |
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41% |
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in |
1991 |
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| Maximum Barometer |
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30.36 |
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29.75 |
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30.18 |
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+00.18 |
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30.76 |
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in |
1991 |
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29.59 |
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in |
1976 |
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| Minimum
Barometer |
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29.94 |
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29.55 |
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29.89 |
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+00.05 |
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30.59 |
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in |
1963 |
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28.94 |
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in |
1948 |
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| Average Barometer |
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30.15 |
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29.65 |
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30.03 |
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+00.12 |
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30.67 |
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in |
1963 |
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29.47 |
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in |
1962 |
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| Average Wind |
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8.9 |
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9.2 |
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7.6 |
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+1.3 |
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23.9 |
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in |
1962 |
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1.3 |
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in |
1963 |
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| Direction |
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NW |
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NNW |
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NW |
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NW |
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NW |
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| High Wind Gust |
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30 |
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24 |
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24 |
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+6 |
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57 |
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in |
1901 |
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10 |
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in |
1967 |
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| Direction |
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SW |
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NNE |
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WNW |
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NW |
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NW |
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| High Heat Index |
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| Wind Chill |
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30 |
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31 |
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13 |
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+17 |
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-32 |
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in |
1962 |
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| Maximum Water Temp |
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45.0 |
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39.7 |
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42.9 |
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+2.1 |
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49.2 |
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in |
2011 |
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38.1 |
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in |
2000 |
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| Minimum
Water Temp |
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42.3 |
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37.8 |
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40.4 |
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+1.9 |
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47.4 |
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in |
2015 |
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34.5 |
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in |
2017 |
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| Average Water Temp |
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43.7 |
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38.8 |
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41.6 |
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+2.0 |
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47.7 |
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in |
2015 |
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36.5 |
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in |
2017 |
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| Sunrise/ AM Twilight |
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7:11:36 AM |
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6:40:28 AM |
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| Sunset /
PM Twilight |
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4:26:10 PM |
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4:57:18 PM |
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| Length Of Day |
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9:14:34 |
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| Special Conditions |
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Fog |
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| Comments |
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December
31, 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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43.5 |
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42.4 |
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42.1 |
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+1.4 |
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54.0 |
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in |
2015 |
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30.8 |
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in |
1989 |
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| Avg
Minimum Temperature |
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30.8 |
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29.5 |
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28.1 |
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+2.7 |
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41.4 |
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in |
2015 |
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14.6 |
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in |
1989 |
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| Average Temperature |
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37.4 |
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36.3 |
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35.1 |
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+2.3 |
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48.0 |
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in |
2015 |
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22.9 |
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in |
1989 |
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| Total
Precipitation |
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6.39 |
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7.52 |
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4.34 |
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+2.05 |
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9.94 |
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in |
1936 |
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.58 |
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in |
1955 |
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| Total Snow |
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7.4 |
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8.4 |
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7.5 |
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-0.1 |
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23.5 |
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in |
2009 |
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T |
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in |
2011 |
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| Total
HDD |
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855 |
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890 |
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919 |
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-64 |
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1304 |
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in |
1989 |
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527 |
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in |
2015 |
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| Total CDD |
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0 |
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0 |
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0 |
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+0 |
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0 |
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in |
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in |
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| Avg Maximum Dew Point |
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37.4 |
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35.9 |
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33.9 |
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+3.5 |
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49.3 |
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in |
2015 |
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16.6 |
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in |
1989 |
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| Avg
Minimum Dew Point |
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22.8 |
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22.3 |
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18.4 |
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+4.5 |
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35.9 |
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in |
2015 |
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0.1 |
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in |
1989 |
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| Average Dew Point |
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30.4 |
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29.5 |
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26.2 |
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+4.2 |
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42.8 |
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in |
2015 |
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8.3 |
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in |
1989 |
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December 31, 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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43.27 |
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57.02 |
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48.32 |
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-5.05 |
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65.49 |
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in |
1983 |
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27.66 |
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in |
1965 |
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| Total
Snow (since Jul 1 20) |
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8.0 |
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8.4 |
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8.6 |
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-0.6 |
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23.7 |
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in |
1904 |
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T |
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in |
1999 |
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| Total HDD (since Jul 1
20) |
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1648 |
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1880 |
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1951 |
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-303 |
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2476 |
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in |
1904 |
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1322 |
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in |
2015 |
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| Total
CDD (since Jan 1) |
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871 |
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731 |
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563 |
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+308 |
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871 |
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in |
2020 |
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290 |
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in |
1902 |
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| Hour-by-Hour Weather For December 31, 2020 |
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| Climate Weather for December 31 |
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| Weather History For December 31 |
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| Weather Calendar |
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| Back To Weather Stat Page |
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