| Portsmouth Rhode Island Weather Almanac |
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| Monday,
December 20, 2021 |
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| Clear and
Much Colder |
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Climate
Normal Period |
Climate Record Period |
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1991 -
2020 |
1893 - 2021 |
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December 20, 2021 |
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Record |
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Record |
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| Observed Daily Data |
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2021 |
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2020 |
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Norm |
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Depart |
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Highest |
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Lowest |
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| Maximum Temperature |
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34 |
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37 |
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42 |
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-8 |
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58 |
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in |
1957 |
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11 |
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in |
1942 |
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| Minimum
Temperature |
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20 |
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25 |
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29 |
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-9 |
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51 |
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in |
1957 |
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-6 |
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in |
1942 |
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| Average Temperature |
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27 |
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31 |
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36 |
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-9 |
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55 |
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in |
1957 |
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3 |
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in |
1942 |
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| Month Avg Max Temperature |
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48.9 |
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42.7 |
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44.4 |
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+4.5 |
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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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| Month Avg
Min Temperature |
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35.0 |
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31.0 |
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31.3 |
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+3.7 |
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40.9 |
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in |
2015 |
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16.4 |
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in |
1989 |
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| Month Average Temperature |
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42.1 |
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37.1 |
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37.8 |
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+4.3 |
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47.4 |
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in |
2015 |
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24.9 |
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in |
1989 |
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| High Heat Index |
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| Low Wind Chill |
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10 |
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23 |
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14 |
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-4 |
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-21 |
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in |
1942 |
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| Heating Degree Days |
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38 |
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34 |
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29 |
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+9 |
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62 |
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in |
1942 |
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10 |
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in |
1957 |
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| Month HDD |
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458 |
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559 |
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543 |
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-85 |
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802 |
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in |
1989 |
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352 |
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in |
2015 |
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| Season HDD |
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1252 |
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1352 |
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1533 |
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-281 |
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2098 |
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in |
1904 |
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1147 |
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in |
2015 |
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| Cooling Degree Days |
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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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| Month 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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| Year Cooling Degree Days |
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795 |
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871 |
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609 |
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+186 |
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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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| Maximum Dew Point |
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27 |
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32 |
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35 |
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-8 |
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56 |
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in |
2002 |
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-1 |
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in |
1983 |
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| Minimum
Dew Point |
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12 |
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20 |
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20 |
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-8 |
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45 |
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in |
1957 |
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-17 |
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in |
1955 |
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| Average Dew Point |
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20 |
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26 |
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27 |
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-7 |
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49 |
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in |
1957 |
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-8 |
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in |
1955 |
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| Month Avg Max Dew Point |
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42.1 |
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36.1 |
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35.5 |
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+6.6 |
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47.6 |
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in |
2015 |
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18.0 |
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in |
1989 |
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| Month Avg
Min Dew Point |
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23.0 |
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23.3 |
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20.3 |
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+2.7 |
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35.4 |
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in |
2015 |
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-0.2 |
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in |
1989 |
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| Month Average Dew Point |
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32.8 |
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29.9 |
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27.9 |
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+4.8 |
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41.7 |
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in |
2015 |
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8.9 |
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in |
1989 |
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| Precipitation |
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.00 |
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.02 |
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.15 |
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-.15 |
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1.48 |
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in |
2002 |
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| One Hour |
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.00 |
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.02 |
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.49 |
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in |
2002 |
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| Hourly Rate |
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.00 |
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.00 |
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.00 |
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in |
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| Month Precipitation |
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.97 |
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4.25 |
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3.01 |
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-2.04 |
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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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| Year Precipitation |
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46.55 |
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41.13 |
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44.44 |
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+2.11 |
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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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| 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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16.0 |
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in |
2009 |
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in |
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| Snow Depth |
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0 |
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6 |
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14 |
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in |
1904 |
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in |
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| Month Snow |
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0.2 |
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7.4 |
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3.6 |
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-3.4 |
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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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| Season Snow |
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0.2 |
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8.0 |
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4.2 |
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-4.0 |
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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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December
20, 2021 |
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|
Record |
Record |
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| Observed Daily Data |
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2021 |
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2020 |
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Norm |
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Depart |
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Highest |
Lowest |
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| Maximum Humidity |
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78% |
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94% |
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84% |
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-6% |
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100% |
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in |
2002 |
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44% |
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in |
1955 |
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| Minimum
Humidity |
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56% |
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76% |
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56% |
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-0% |
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90% |
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in |
1987 |
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22% |
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in |
1962 |
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| Average Humidity |
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67% |
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85% |
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70% |
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-3% |
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95% |
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in |
1987 |
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35% |
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in |
1955 |
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| Maximum Barometer |
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30.37 |
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30.30 |
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30.19 |
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+00.18 |
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30.97 |
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in |
1990 |
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29.50 |
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in |
1995 |
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| Minimum
Barometer |
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30.18 |
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29.98 |
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29.86 |
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+00.32 |
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30.42 |
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in |
1979 |
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29.09 |
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in |
1934 |
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| Average Barometer |
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30.28 |
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30.14 |
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30.02 |
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+00.25 |
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30.60 |
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in |
1990 |
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29.43 |
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in |
1995 |
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| Average Wind |
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5.8 |
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2.5 |
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8.0 |
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-2.2 |
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17.5 |
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in |
2009 |
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2.2 |
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in |
1993 |
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| Direction |
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NNW |
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NNW |
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WNW |
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NW |
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SW |
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| High Wind Gust |
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21 |
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9 |
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25 |
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-4 |
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48 |
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in |
1970 |
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9 |
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in |
2020 |
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| Direction |
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NNW |
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NNW |
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NNW |
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WNW |
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NNW |
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| Maximum Water Temp |
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46.9 |
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45.3 |
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45.1 |
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+1.8 |
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50.7 |
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in |
2006 |
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40.8 |
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in |
2019 |
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| Minimum
Water Temp |
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43.7 |
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43.2 |
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42.4 |
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+1.3 |
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47.3 |
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in |
2015 |
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37.9 |
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in |
2019 |
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| Average Water Temp |
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45.3 |
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44.3 |
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43.8 |
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+1.5 |
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48.9 |
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in |
2011 |
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39.4 |
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in |
2019 |
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| Sunrise/ AM Twilight |
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7:07:52 AM |
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6:38:06 AM |
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| Sunset /
PM Twilight |
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4:17:48 PM |
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4:47:34 PM |
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| Length Of Day |
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9:09:56 |
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| Special Conditions |
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None |
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| Comments |
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| Hour-by-Hour Weather For December 20, 2021 |
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| Climate Weather for December 20 |
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| Weather History For December 20 |
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| Weather Calendar |
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| Back
To Weather Stat Page |
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