| Portsmouth Rhode Island
Weather Almanac |
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| Saturday, December 15, 2018 |
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| Cloudy, Light Rain/Drizzle and Fog Morning, Partly Cloudy
Late, Much 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 15, 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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52 |
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28 |
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42 |
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+10 |
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61 |
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in |
2015 |
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24 |
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in |
2010 |
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| Minimum
Temperature |
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41 |
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13 |
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28 |
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+13 |
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48 |
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in |
2015 |
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9 |
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in |
1900 |
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| Average Temperature |
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47 |
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21 |
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35 |
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+12 |
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55 |
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in |
2015 |
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18 |
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in |
1900 |
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| Precipitation |
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.05 |
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.10 |
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.14 |
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-.09 |
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1.79 |
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in |
1981 |
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| One Hour |
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.03 |
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.00 |
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.60 |
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in |
1987 |
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| Snow |
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0.0 |
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1.6 |
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0.2 |
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-0.2 |
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7.1 |
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in |
1905 |
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| Snow
Depth |
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0 |
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3 |
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11 |
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in |
1904 |
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| HDD |
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18 |
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44 |
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30 |
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-12 |
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47 |
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in |
1900 |
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10 |
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in |
2015 |
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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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51 |
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24 |
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34 |
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+17 |
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60 |
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in |
2015 |
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10 |
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in |
2010 |
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| Minimum
Dew Point |
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36 |
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8 |
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19 |
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+18 |
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43 |
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in |
2008 |
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-5 |
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in |
2016 |
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| Average Dew Point |
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44 |
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16 |
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26 |
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+18 |
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50 |
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in |
2015 |
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4 |
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in |
1961 |
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| Maximum Humidity |
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100% |
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92% |
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86% |
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+14% |
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100% |
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in |
2018 |
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49% |
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in |
1961 |
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| Minimum
Humidity |
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82% |
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61% |
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57% |
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+25% |
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96% |
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in |
1993 |
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17% |
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in |
1959 |
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| Average Humidity |
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91% |
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77% |
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71% |
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+20% |
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98% |
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in |
1993 |
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42% |
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in |
1961 |
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| Maximum Barometer |
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30.25 |
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30.14 |
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30.13 |
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+00.12 |
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30.68 |
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in |
1902 |
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29.24 |
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in |
1954 |
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| Minimum
Barometer |
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30.12 |
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29.82 |
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29.80 |
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+00.32 |
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30.46 |
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in |
1994 |
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29.05 |
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in |
1968 |
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| Average Barometer |
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30.19 |
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29.98 |
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29.97 |
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+00.22 |
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30.51 |
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in |
1994 |
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29.16 |
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in |
1954 |
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| Average Wind |
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7.4 |
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3.7 |
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8.7 |
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-1.3 |
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19.1 |
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in |
1961 |
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2.6 |
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in |
2014 |
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| Direction |
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NNE |
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NNE |
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WNW |
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NNW |
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WNW |
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| High Wind Gust |
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23 |
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19 |
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27 |
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-4 |
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53 |
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in |
1953 |
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11 |
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in |
1992 |
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| Direction |
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NNE |
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WNW |
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WNW |
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WSW |
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WSW |
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| High Heat Index |
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| Wind Chill |
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35 |
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7 |
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18 |
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+17 |
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-4 |
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in |
1980 |
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| Maximum Water Temp |
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44.2 |
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43.8 |
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46.2 |
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-2.0 |
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51.9 |
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in |
2015 |
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41.5 |
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in |
1997 |
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| Minimum
Water Temp |
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41.5 |
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39.7 |
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43.6 |
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-2.1 |
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50.7 |
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in |
2015 |
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38.7 |
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in |
2010 |
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| Average Water Temp |
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42.9 |
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41.8 |
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44.9 |
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-2.0 |
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51.3 |
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in |
2015 |
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40.1 |
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in |
1997 |
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| Sunrise/ AM Twilight |
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7:05:05 AM |
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6:33:48 AM |
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| Sunset /
PM Twilight |
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4:16:30 PM |
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4:47:47 PM |
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| Length Of Day |
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9:11:25 |
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| Special Conditions |
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None |
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| Comments |
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December 15, 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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42.3 |
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43.2 |
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44.4 |
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-2.1 |
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54.8 |
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in |
2015 |
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30.1 |
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in |
1904 |
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| Avg
Minimum Temperature |
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28.3 |
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31.0 |
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30.7 |
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-2.4 |
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42.3 |
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in |
2015 |
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16.1 |
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in |
1989 |
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| Average Temperature |
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35.3 |
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37.1 |
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37.5 |
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-2.2 |
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48.5 |
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in |
2015 |
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24.4 |
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in |
1904 |
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| Total
Precipitation |
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1.20 |
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1.19 |
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2.21 |
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-1.01 |
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6.64 |
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in |
1936 |
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.20 |
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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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2.9 |
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-2.9 |
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19.9 |
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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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441 |
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415 |
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408 |
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+33 |
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606 |
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in |
1893 |
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242 |
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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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33.3 |
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35.4 |
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36.3 |
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-3.1 |
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49.1 |
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in |
2015 |
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18.0 |
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in |
1989 |
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| Avg
Minimum Dew Point |
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18.6 |
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21.9 |
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19.5 |
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-0.9 |
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38.0 |
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in |
2015 |
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-1.5 |
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in |
1989 |
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| Average Dew Point |
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25.9 |
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28.6 |
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27.2 |
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-1.3 |
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43.6 |
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in |
2015 |
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8.3 |
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in |
1989 |
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December 15, 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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50.43 |
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40.30 |
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46.06 |
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+4.37 |
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63.81 |
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in |
1984 |
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27.09 |
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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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4.0 |
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+0.2 |
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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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1501 |
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1212 |
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1440 |
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+61 |
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1918 |
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in |
1904 |
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1037 |
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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 15, 2018 |
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| Climate Weather for December 15 |
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| Weather History For December 15 |
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| Weather Calendar |
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