| Portsmouth Rhode Island
Weather Almanac |
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| Monday, December 17, 2018 |
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| Cloudy. Light Rain and
Fog early, Windy and Continued Warm |
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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 17, 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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41 |
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30 |
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41 |
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+0 |
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58 |
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in |
2015 |
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18 |
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in |
1932 |
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| Minimum
Temperature |
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36 |
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21 |
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27 |
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+9 |
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44 |
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in |
1996 |
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-1 |
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in |
1942 |
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| Average Temperature |
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39 |
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26 |
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34 |
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+5 |
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50 |
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in |
1928 |
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10 |
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in |
1919 |
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| Precipitation |
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.02 |
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.00 |
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.14 |
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-.12 |
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3.13 |
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in |
1973 |
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| One Hour |
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.01 |
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.00 |
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.95 |
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in |
2000 |
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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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4.0 |
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in |
1961 |
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| Snow
Depth |
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0 |
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3 |
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12 |
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in |
1904 |
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| HDD |
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26 |
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39 |
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30 |
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-4 |
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55 |
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in |
1919 |
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15 |
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in |
1928 |
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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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40 |
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16 |
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34 |
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+7 |
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58 |
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in |
1973 |
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2 |
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in |
1951 |
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| Minimum
Dew Point |
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30 |
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6 |
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18 |
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+12 |
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43 |
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in |
1996 |
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-12 |
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in |
1979 |
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| Average Dew Point |
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35 |
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11 |
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26 |
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+9 |
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48 |
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in |
1996 |
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-2 |
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in |
1951 |
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| Maximum Humidity |
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96% |
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72% |
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85% |
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+11% |
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100% |
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in |
2016 |
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60% |
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in |
2009 |
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| Minimum
Humidity |
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67% |
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36% |
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56% |
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+11% |
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94% |
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in |
1996 |
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24% |
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in |
1979 |
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| Average Humidity |
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82% |
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54% |
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70% |
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+11% |
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97% |
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in |
1996 |
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50% |
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in |
1953 |
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| Maximum Barometer |
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29.66 |
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30.29 |
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30.13 |
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-00.47 |
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30.68 |
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in |
1899 |
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29.64 |
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in |
1976 |
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| Minimum
Barometer |
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29.57 |
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30.18 |
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29.77 |
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-00.20 |
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30.32 |
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in |
1949 |
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28.93 |
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in |
1970 |
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| Average Barometer |
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29.62 |
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30.24 |
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29.95 |
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-00.33 |
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30.42 |
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in |
1949 |
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29.39 |
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in |
1973 |
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| Average Wind |
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13.5 |
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6.1 |
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8.4 |
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+5.1 |
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19.7 |
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in |
2000 |
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1.2 |
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in |
1962 |
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| Direction |
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WNW |
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WNW |
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WNW |
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SSE |
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NNE |
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| High Wind Gust |
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29 |
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21 |
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26 |
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+3 |
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53 |
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in |
2000 |
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10 |
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in |
1962 |
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| Direction |
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NNE |
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NW |
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WNW |
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WSW |
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NNW |
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| High Heat Index |
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| Wind Chill |
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26 |
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13 |
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17 |
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+9 |
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-9 |
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in |
1972 |
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| Maximum Water Temp |
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44.2 |
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42.2 |
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45.8 |
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-1.6 |
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52.3 |
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in |
2011 |
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41.3 |
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in |
2013 |
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| Minimum
Water Temp |
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42.6 |
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39.2 |
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43.2 |
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-0.6 |
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49.6 |
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in |
2015 |
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38.4 |
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in |
2010 |
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| Average Water Temp |
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43.4 |
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40.7 |
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44.5 |
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-1.1 |
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50.5 |
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in |
2011 |
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40.2 |
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in |
2013 |
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| Sunrise/ AM Twilight |
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7:06:22 AM |
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6:35:04 AM |
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| Sunset /
PM Twilight |
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4:17:10 PM |
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4:48:28 PM |
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| Length Of Day |
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9:10:48 |
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| Special Conditions |
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Fog |
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| Comments |
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December 17, 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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42.2 |
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41.9 |
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44.1 |
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-1.8 |
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54.6 |
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in |
2015 |
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30.5 |
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in |
1904 |
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| Avg
Minimum Temperature |
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29.5 |
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29.9 |
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30.4 |
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-0.9 |
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42.0 |
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in |
2015 |
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16.5 |
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in |
1989 |
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| Average Temperature |
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35.9 |
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35.9 |
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37.2 |
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-1.3 |
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48.3 |
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in |
2015 |
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24.6 |
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in |
1904 |
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| Total
Precipitation |
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1.95 |
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1.19 |
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2.49 |
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-.54 |
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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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3.4 |
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-3.4 |
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20.6 |
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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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490 |
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491 |
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468 |
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+22 |
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683 |
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in |
1904 |
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279 |
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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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34.1 |
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33.6 |
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36.0 |
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-1.9 |
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49.1 |
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in |
2015 |
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18.4 |
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in |
1989 |
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| Avg
Minimum Dew Point |
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20.2 |
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20.5 |
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19.2 |
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+1.0 |
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37.6 |
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in |
2015 |
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-0.8 |
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in |
1989 |
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| Average Dew Point |
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27.1 |
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27.1 |
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26.9 |
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+0.2 |
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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 17, 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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40.30 |
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46.34 |
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+4.84 |
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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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4.5 |
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-0.3 |
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21.1 |
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in |
1898 |
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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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1550 |
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1288 |
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1500 |
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+50 |
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1995 |
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in |
1904 |
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1074 |
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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 17, 2018 |
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| Climate Weather for December 17 |
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| Weather History For December 17 |
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| Weather Calendar |
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