| Portsmouth Rhode Island
Weather Almanac |
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| Wednesday, December 12, 2018 |
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| Mostly Cloudy early, Partly Cloudy Day to Clear PM, Windy,
Continued Dry and Cold |
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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 12, 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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39 |
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50 |
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43 |
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-4 |
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62 |
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in |
2015 |
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17 |
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in |
1905 |
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| Minimum
Temperature |
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25 |
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34 |
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29 |
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-4 |
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49 |
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in |
2015 |
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3 |
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in |
1988 |
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| Average Temperature |
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32 |
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42 |
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36 |
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-4 |
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56 |
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in |
2015 |
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12 |
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in |
1988 |
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| Precipitation |
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.00 |
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.10 |
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.14 |
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-.14 |
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1.46 |
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in |
2008 |
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| One Hour |
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.00 |
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.04 |
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.42 |
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in |
2008 |
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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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6.1 |
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in |
1960 |
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| Snow
Depth |
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0 |
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T |
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8 |
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in |
1981 |
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| HDD |
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33 |
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23 |
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28 |
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+5 |
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53 |
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in |
1988 |
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9 |
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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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27 |
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47 |
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35 |
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-8 |
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59 |
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in |
2008 |
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2 |
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in |
1988 |
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| Minimum
Dew Point |
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5 |
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24 |
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20 |
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-15 |
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41 |
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in |
2015 |
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-15 |
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in |
1988 |
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| Average Dew Point |
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16 |
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36 |
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27 |
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-11 |
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47 |
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in |
1949 |
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-7 |
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in |
1988 |
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| Maximum Humidity |
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77% |
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93% |
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89% |
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-12% |
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100% |
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in |
2016 |
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50% |
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in |
1975 |
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| Minimum
Humidity |
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38% |
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66% |
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58% |
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-20% |
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95% |
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in |
1949 |
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28% |
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in |
1977 |
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| Average Humidity |
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58% |
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80% |
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74% |
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-16% |
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98% |
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in |
1949 |
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40% |
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in |
1975 |
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| Maximum Barometer |
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30.34 |
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30.00 |
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30.16 |
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+00.18 |
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30.69 |
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in |
1929 |
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29.47 |
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in |
1951 |
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| Minimum
Barometer |
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29.87 |
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29.30 |
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29.82 |
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+00.05 |
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30.50 |
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in |
2006 |
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28.95 |
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in |
1944 |
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| Average Barometer |
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30.11 |
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29.65 |
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29.99 |
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+00.12 |
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30.57 |
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in |
2006 |
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29.40 |
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in |
1951 |
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| Average Wind |
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10.7 |
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8.3 |
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8.0 |
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+2.7 |
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24.4 |
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in |
1960 |
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1.0 |
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in |
1997 |
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| Direction |
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NNW |
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SSE |
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WNW |
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N |
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WNW |
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| High Wind Gust |
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31 |
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25 |
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25 |
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+6 |
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59 |
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in |
1960 |
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6 |
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in |
1997 |
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| Direction |
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NNW |
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SE |
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WNW |
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N |
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WNW |
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| High Heat Index |
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| Wind Chill |
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15 |
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27 |
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20 |
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-5 |
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-12 |
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in |
1988 |
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| Maximum Water Temp |
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44.2 |
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46.9 |
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47.0 |
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-2.8 |
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52.3 |
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in |
2011 |
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43.2 |
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in |
2013 |
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| Minimum
Water Temp |
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40.6 |
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44.6 |
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44.5 |
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-3.9 |
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50.4 |
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in |
2015 |
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40.2 |
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in |
2013 |
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| Average Water Temp |
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42.4 |
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45.8 |
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45.7 |
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-3.3 |
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50.7 |
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in |
2015 |
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41.7 |
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in |
2013 |
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| Sunrise/ AM Twilight |
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7:02:55 AM |
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6:31:42 AM |
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| Sunset /
PM Twilight |
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4:15:48 PM |
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4:47:00 PM |
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| Length Of Day |
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9:12:53 |
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| Special Conditions |
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None |
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| Comments |
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December 12, 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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41.5 |
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46.3 |
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44.9 |
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-3.4 |
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54.6 |
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in |
1953 |
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30.8 |
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in |
1904 |
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| Avg
Minimum Temperature |
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27.8 |
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34.3 |
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31.3 |
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-3.5 |
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40.7 |
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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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34.6 |
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40.3 |
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38.1 |
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-3.5 |
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47.2 |
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in |
2015 |
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25.3 |
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in |
1904 |
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| Total
Precipitation |
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1.15 |
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.95 |
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1.79 |
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-.64 |
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6.47 |
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in |
1936 |
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T |
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in |
1988 |
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| Total Snow |
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T |
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1.4 |
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2.3 |
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-2.3 |
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17.0 |
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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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361 |
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293 |
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320 |
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+41 |
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474 |
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in |
1904 |
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210 |
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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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31.3 |
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38.0 |
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36.8 |
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-5.5 |
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47.4 |
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in |
2015 |
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19.6 |
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in |
1989 |
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| Avg
Minimum Dew Point |
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17.5 |
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25.6 |
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19.9 |
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-2.4 |
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36.8 |
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in |
2015 |
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-0.5 |
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in |
1989 |
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| Average Dew Point |
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24.4 |
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31.8 |
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27.5 |
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-3.1 |
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42.1 |
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in |
2015 |
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9.5 |
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in |
1989 |
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December 12, 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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50.38 |
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40.06 |
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45.64 |
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+4.74 |
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62.00 |
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in |
1983 |
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26.39 |
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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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1.4 |
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3.4 |
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+0.8 |
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20.5 |
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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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1421 |
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1090 |
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1352 |
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+69 |
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1786 |
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in |
1904 |
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1005 |
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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 12, 2018 |
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| Climate Weather for December 12 |
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| Weather History For December 12 |
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| Weather Calendar |
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| Back To Weather Stat Page |
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