| Portsmouth Rhode Island
Weather Almanac |
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| Monday, December 21, 2020 |
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| Cloudy to Mostly Cloudy PM, Foggy, Light Winds and Seasonal
Temperatures |
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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
21, 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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35 |
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36 |
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40 |
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-5 |
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58 |
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in |
1999 |
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13 |
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in |
1955 |
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| Minimum
Temperature |
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30 |
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19 |
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26 |
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+4 |
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49 |
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in |
2018 |
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-3 |
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in |
1955 |
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| Average Temperature |
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33 |
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28 |
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33 |
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+0 |
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53 |
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in |
2018 |
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5 |
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in |
1955 |
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| Precipitation |
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.00 |
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.00 |
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.14 |
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-.14 |
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2.05 |
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in |
1946 |
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| One
Hour |
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.00 |
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.00 |
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.59 |
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in |
1993 |
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| Snow |
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0.0 |
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0.0 |
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0.3 |
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-0.3 |
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7.2 |
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in |
1954 |
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| Snow
Depth |
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5 |
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0 |
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20 |
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in |
2009 |
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| HDD |
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32 |
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37 |
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32 |
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+0 |
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60 |
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in |
1955 |
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12 |
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in |
2018 |
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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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34 |
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30 |
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32 |
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+2 |
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57 |
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in |
2018 |
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-12 |
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in |
1955 |
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| Minimum
Dew Point |
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28 |
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14 |
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16 |
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+12 |
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45 |
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in |
2018 |
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-23 |
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in |
1955 |
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| Average Dew Point |
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31 |
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22 |
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24 |
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+7 |
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51 |
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in |
2018 |
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-18 |
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in |
1955 |
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| Maximum Humidity |
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96% |
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92% |
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84% |
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+12% |
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100% |
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in |
2018 |
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44% |
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in |
1955 |
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| Minimum
Humidity |
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89% |
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69% |
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57% |
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+32% |
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96% |
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in |
1972 |
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22% |
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in |
1955 |
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| Average Humidity |
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93% |
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81% |
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71% |
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+22% |
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98% |
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in |
1972 |
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33% |
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in |
1955 |
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| Maximum Barometer |
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29.98 |
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30.64 |
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30.17 |
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-00.19 |
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30.94 |
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in |
1983 |
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29.42 |
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in |
1978 |
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| Minimum
Barometer |
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29.67 |
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30.43 |
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29.83 |
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-00.16 |
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30.50 |
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in |
1983 |
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28.95 |
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in |
1973 |
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| Average Barometer |
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29.83 |
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30.54 |
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30.00 |
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-00.17 |
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30.72 |
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in |
1983 |
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29.21 |
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in |
1976 |
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| Average Wind |
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3.2 |
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4.5 |
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9.0 |
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-5.8 |
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18.6 |
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in |
1976 |
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2.7 |
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in |
1956 |
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| Direction |
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NNW |
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N |
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WNW |
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WNW |
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SW |
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| High Wind Gust |
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16 |
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15 |
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27 |
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-11 |
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48 |
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in |
1957 |
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12 |
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in |
1983 |
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| Direction |
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NNE |
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N |
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WNW |
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S |
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NE |
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| High Heat Index |
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| Wind Chill |
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28 |
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10 |
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16 |
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+12 |
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-25 |
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in |
1955 |
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| Maximum Water Temp |
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44.8 |
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40.6 |
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44.8 |
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+0.0 |
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50.2 |
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in |
2006 |
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40.6 |
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in |
2019 |
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| Minimum
Water Temp |
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43.9 |
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37.5 |
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42.2 |
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+1.7 |
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47.2 |
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in |
2011 |
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37.2 |
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in |
2004 |
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| Average Water Temp |
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44.4 |
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39.1 |
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43.5 |
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+0.9 |
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48.4 |
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in |
2011 |
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39.1 |
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in |
2019 |
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| Sunrise/ AM Twilight |
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7:08:48 AM |
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6:37:29 AM |
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| Sunset /
PM Twilight |
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4:19:12 PM |
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4:50:31 PM |
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| Length Of Day |
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9:10:24 |
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| Special Conditions |
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Fog all day |
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| Comments |
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December
21, 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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42.3 |
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41.0 |
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43.4 |
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-1.0 |
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53.3 |
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in |
2015 |
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31.6 |
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in |
1904 |
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| Avg
Minimum Temperature |
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30.9 |
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27.9 |
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29.7 |
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+1.2 |
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40.7 |
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in |
2015 |
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16.0 |
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in |
1989 |
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| Average Temperature |
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36.9 |
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34.8 |
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36.5 |
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+0.4 |
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47.3 |
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in |
2015 |
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24.6 |
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in |
1989 |
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| Total
Precipitation |
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4.25 |
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5.28 |
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3.05 |
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+1.20 |
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9.27 |
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in |
1936 |
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.27 |
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in |
1998 |
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| Total Snow |
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7.4 |
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8.4 |
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4.6 |
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+2.8 |
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21.3 |
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in |
1981 |
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0.0 |
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in |
2015 |
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| Total
HDD |
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591 |
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635 |
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593 |
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-2 |
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849 |
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in |
1989 |
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371 |
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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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36.0 |
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35.2 |
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35.4 |
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+0.6 |
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47.8 |
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in |
2015 |
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17.8 |
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in |
1989 |
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| Avg
Minimum Dew Point |
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23.5 |
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20.0 |
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20.1 |
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+3.4 |
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35.1 |
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in |
2015 |
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-0.4 |
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in |
1989 |
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| Average Dew Point |
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30.0 |
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28.0 |
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27.8 |
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+2.2 |
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41.6 |
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in |
2015 |
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8.7 |
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in |
1989 |
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December 21, 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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41.13 |
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54.78 |
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47.03 |
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-5.90 |
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63.81 |
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in |
1983 |
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27.14 |
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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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5.7 |
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+2.3 |
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21.3 |
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in |
1898 |
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0.0 |
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in |
2015 |
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| Total HDD (since Jul 1
20) |
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1384 |
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1625 |
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1625 |
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-241 |
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2137 |
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in |
1904 |
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1166 |
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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 21, 2020 |
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| Climate Weather for December 21 |
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| Weather History For December 21 |
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| Weather Calendar |
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| Back To Weather Stat Page |
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