| Portsmouth Rhode Island
Weather Almanac |
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| Tuesday, December 18, 2018 |
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| Partly Cloudy Morning then Clear, Very Windy, Dry and Colder |
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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 18, 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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38 |
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41 |
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41 |
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-3 |
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60 |
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in |
1984 |
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11 |
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in |
1919 |
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| Minimum
Temperature |
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24 |
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26 |
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27 |
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-3 |
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47 |
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in |
1996 |
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-3 |
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in |
1919 |
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| Average Temperature |
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31 |
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34 |
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34 |
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-3 |
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50 |
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in |
2012 |
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4 |
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in |
1919 |
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| Precipitation |
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.00 |
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.12 |
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.14 |
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-.14 |
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1.46 |
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in |
1954 |
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| One Hour |
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.00 |
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.04 |
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.44 |
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in |
1954 |
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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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6.6 |
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in |
1904 |
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| Snow
Depth |
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0 |
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2 |
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12 |
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in |
1904 |
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| HDD |
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34 |
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31 |
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31 |
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+3 |
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61 |
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in |
1919 |
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15 |
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in |
2012 |
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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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30 |
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38 |
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33 |
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-3 |
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54 |
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in |
2016 |
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4 |
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in |
2009 |
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| Minimum
Dew Point |
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10 |
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13 |
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17 |
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-7 |
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47 |
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in |
1996 |
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-10 |
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in |
1979 |
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| Average Dew Point |
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20 |
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26 |
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25 |
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-5 |
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50 |
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in |
1996 |
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-1 |
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in |
1979 |
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| Maximum Humidity |
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72% |
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100% |
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84% |
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-12% |
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100% |
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in |
2017 |
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51% |
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in |
1978 |
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| Minimum
Humidity |
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42% |
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54% |
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54% |
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-12% |
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96% |
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in |
1996 |
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26% |
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in |
2002 |
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| Average Humidity |
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57% |
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77% |
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69% |
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-12% |
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98% |
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in |
1996 |
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43% |
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in |
1978 |
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| Maximum Barometer |
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30.05 |
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30.25 |
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30.14 |
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-00.09 |
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30.59 |
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in |
1957 |
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29.59 |
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in |
2001 |
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| Minimum
Barometer |
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29.59 |
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29.88 |
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29.79 |
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-00.20 |
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30.38 |
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in |
1957 |
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29.14 |
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in |
2001 |
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| Average Barometer |
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29.82 |
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30.07 |
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29.97 |
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-00.15 |
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30.49 |
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in |
1957 |
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29.37 |
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in |
2001 |
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| Average Wind |
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20.4 |
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3.4 |
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8.5 |
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+11.9 |
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20.4 |
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in |
2018 |
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1.5 |
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in |
1967 |
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| Direction |
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NW |
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ENE |
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WNW |
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NW |
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ESE |
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| High Wind Gust |
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47 |
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14 |
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27 |
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+20 |
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52 |
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in |
1956 |
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9 |
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in |
1967 |
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| Direction |
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NW |
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SSE |
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WNW |
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WNW |
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ESE |
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| High Heat Index |
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| Wind Chill |
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10 |
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23 |
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15 |
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-5 |
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-8 |
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in |
1979 |
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| Maximum Water Temp |
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42.6 |
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43.9 |
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45.7 |
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-3.1 |
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51.5 |
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in |
2011 |
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39.9 |
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in |
2007 |
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| Minimum
Water Temp |
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38.7 |
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40.3 |
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43.4 |
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-4.7 |
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50.2 |
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in |
2015 |
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37.5 |
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in |
2007 |
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| Average Water Temp |
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40.7 |
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42.1 |
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44.6 |
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-3.9 |
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50.4 |
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in |
2015 |
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38.7 |
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in |
2007 |
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| Sunrise/ AM Twilight |
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7:06:58 AM |
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6:35:39 AM |
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| Sunset /
PM Twilight |
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4:17:33 PM |
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4:48:52 PM |
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| Length Of Day |
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9:10:35 |
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| Special Conditions |
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None |
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| Comments |
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Record breaking high average wind |
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December 18, 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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42.0 |
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41.8 |
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43.9 |
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-1.9 |
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54.6 |
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in |
2015 |
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30.7 |
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in |
1904 |
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| Avg
Minimum Temperature |
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29.2 |
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29.7 |
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30.2 |
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-1.0 |
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41.8 |
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in |
2015 |
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16.4 |
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in |
1989 |
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| Average Temperature |
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35.6 |
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35.8 |
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37.0 |
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-1.4 |
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48.2 |
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in |
2015 |
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24.9 |
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in |
1904 |
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| Total
Precipitation |
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1.95 |
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1.31 |
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2.63 |
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-.68 |
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7.74 |
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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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T |
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6.1 |
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3.7 |
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-3.7 |
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21.3 |
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in |
1981 |
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0.0 |
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in |
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| Total
HDD |
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524 |
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522 |
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499 |
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+25 |
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719 |
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in |
1904 |
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297 |
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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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33.8 |
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33.9 |
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35.9 |
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-2.0 |
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49.3 |
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in |
2015 |
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18.1 |
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in |
1989 |
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| Avg
Minimum Dew Point |
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19.7 |
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20.1 |
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19.0 |
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+0.7 |
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37.4 |
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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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26.8 |
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27.0 |
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26.7 |
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+0.1 |
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43.4 |
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in |
2015 |
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8.8 |
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in |
1989 |
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December 18, 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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51.18 |
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40.42 |
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46.48 |
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+4.70 |
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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 18) |
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4.2 |
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6.1 |
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4.8 |
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-0.6 |
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21.3 |
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in |
1981 |
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0.0 |
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in |
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| Total HDD (since Jul 1
18) |
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1584 |
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1319 |
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1531 |
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+53 |
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2031 |
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in |
1904 |
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1092 |
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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 18, 2018 |
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| Climate Weather for December 18 |
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| Weather History For December 18 |
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| Weather Calendar |
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| Back To Weather Stat Page |
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