| Portsmouth Rhode Island
Weather Almanac |
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| Monday, December 31, 2018 |
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| Partly Cloudy and Very Light Winds early, Mostly Cloudy Day
to Cloudy, Moderate Rain and Fog PM, 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 - 2018 |
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December 31, 2018 |
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Record |
Record |
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| Observed Daily Data |
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Observed |
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2017 |
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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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45 |
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17 |
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39 |
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+6 |
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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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28 |
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6 |
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24 |
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+4 |
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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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37 |
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12 |
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32 |
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+5 |
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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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.52 |
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.00 |
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.12 |
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+.40 |
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1.37 |
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in |
1906 |
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| One Hour |
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.15 |
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.00 |
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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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2 |
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15 |
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in |
1947 |
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| HDD |
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28 |
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53 |
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33 |
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-5 |
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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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| Maximum Dew Point |
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41 |
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13 |
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30 |
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+11 |
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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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25 |
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-4 |
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14 |
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+11 |
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35 |
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in |
1992 |
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-18 |
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in |
1962 |
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| Average Dew Point |
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33 |
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5 |
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22 |
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+11 |
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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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94% |
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83% |
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85% |
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+9% |
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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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60% |
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50% |
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53% |
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+7% |
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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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77% |
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67% |
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69% |
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+8% |
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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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30.41 |
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30.23 |
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30.18 |
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+00.23 |
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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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29.90 |
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29.96 |
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29.89 |
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+00.01 |
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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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30.16 |
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30.10 |
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30.04 |
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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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7.5 |
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12.3 |
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7.5 |
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-0.0 |
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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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S |
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WNW |
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WNW |
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NW |
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NW |
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| High Wind Gust |
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33 |
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28 |
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24 |
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+9 |
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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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SSE |
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WNW |
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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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28 |
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-12 |
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13 |
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+15 |
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-32 |
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in |
1962 |
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| Maximum Water Temp |
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41.2 |
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38.5 |
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42.9 |
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-1.7 |
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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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39.7 |
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34.5 |
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40.4 |
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-0.7 |
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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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40.5 |
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36.5 |
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41.6 |
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-1.2 |
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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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7:11:33 AM |
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6:40:24 AM |
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| Sunset /
PM Twilight |
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4:25:44 PM |
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4:56:53 PM |
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| Length Of Day |
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9:14:11 |
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| Special Conditions |
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Fog |
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| Comments |
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December 31, 2018 |
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Record |
Record |
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| Month-to-Date Summary |
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Observed |
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2017 |
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Normal |
Depart |
Highest |
Lowest |
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| Avg Maximum Temperature |
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43.2 |
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38.2 |
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42.1 |
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+1.1 |
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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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30.2 |
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26.3 |
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28.1 |
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+2.1 |
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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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36.7 |
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32.2 |
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35.1 |
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+1.6 |
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47.7 |
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in |
2015 |
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22.7 |
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in |
1989 |
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| Total
Precipitation |
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4.37 |
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2.34 |
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4.34 |
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+.03 |
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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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0.2 |
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8.1 |
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7.5 |
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-7.3 |
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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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869 |
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1008 |
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919 |
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-50 |
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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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807 |
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in |
2016 |
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290 |
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in |
1902 |
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| Avg Maximum Dew Point |
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35.9 |
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30.0 |
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33.9 |
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+1.9 |
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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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21.1 |
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16.2 |
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17.3 |
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+3.8 |
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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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28.5 |
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23.1 |
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25.2 |
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+3.3 |
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42.6 |
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in |
2015 |
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8.3 |
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in |
1989 |
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December 31, 2018 |
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Record |
Record |
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| Year-to-Date Summary |
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Observed |
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2017 |
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Normal |
Depart |
Highest |
Lowest |
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| Total Precipitation |
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53.60 |
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41.45 |
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48.19 |
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+5.41 |
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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 18) |
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4.4 |
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8.1 |
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8.6 |
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-4.2 |
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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
18) |
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1929 |
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1805 |
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1951 |
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-22 |
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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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775 |
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580 |
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563 |
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+212 |
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807 |
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in |
2016 |
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290 |
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in |
1902 |
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| Hour-by-Hour Weather For December 31, 2018 |
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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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