| Portsmouth Rhode Island
Weather Almanac |
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| Thursday, December 13, 2018 |
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| Clear Morning, Partly Cloudy Day to Mostly Cloudy PM,
Continued 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 13, 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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36 |
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35 |
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43 |
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-7 |
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60 |
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in |
1983 |
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17 |
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in |
1960 |
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| Minimum
Temperature |
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23 |
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21 |
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29 |
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-6 |
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49 |
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in |
2015 |
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6 |
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in |
1905 |
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| Average Temperature |
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30 |
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28 |
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36 |
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-6 |
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55 |
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in |
1983 |
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13 |
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in |
1960 |
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| Precipitation |
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.00 |
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.00 |
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.14 |
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-.14 |
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2.43 |
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in |
1915 |
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| One Hour |
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.00 |
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.00 |
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.27 |
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in |
1983 |
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| Snow |
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0.0 |
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0.0 |
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0.2 |
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-0.2 |
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5.4 |
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in |
2007 |
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| Snow
Depth |
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0 |
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0 |
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9 |
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in |
1970 |
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| HDD |
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35 |
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37 |
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29 |
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+6 |
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52 |
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in |
1960 |
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10 |
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in |
1983 |
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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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26 |
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30 |
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35 |
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-9 |
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58 |
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in |
1983 |
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-1 |
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in |
1960 |
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| Minimum
Dew Point |
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8 |
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7 |
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19 |
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-11 |
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45 |
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in |
1983 |
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-16 |
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in |
1976 |
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| Average Dew Point |
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17 |
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19 |
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27 |
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-10 |
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52 |
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in |
1983 |
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-6 |
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in |
1960 |
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| Maximum Humidity |
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85% |
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83% |
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86% |
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-1% |
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100% |
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in |
2007 |
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57% |
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in |
1989 |
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| Minimum
Humidity |
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49% |
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46% |
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55% |
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-6% |
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90% |
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in |
1965 |
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27% |
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in |
1989 |
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| Average Humidity |
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67% |
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65% |
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71% |
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-4% |
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95% |
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in |
1965 |
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42% |
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in |
1989 |
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| Maximum Barometer |
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30.55 |
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29.63 |
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30.17 |
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+00.38 |
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30.82 |
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in |
1975 |
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29.24 |
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in |
2010 |
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| Minimum
Barometer |
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30.34 |
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29.27 |
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29.85 |
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+00.49 |
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30.53 |
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in |
1994 |
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29.06 |
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in |
2010 |
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| Average Barometer |
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30.45 |
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29.45 |
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30.01 |
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+00.44 |
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30.65 |
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in |
1975 |
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29.15 |
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in |
2010 |
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| Average Wind |
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7.2 |
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17.2 |
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8.1 |
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-0.9 |
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21.4 |
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in |
1976 |
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1.7 |
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in |
1954 |
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| Direction |
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E |
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W |
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N |
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NW |
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NW |
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| High Wind Gust |
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20 |
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41 |
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25 |
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-5 |
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62 |
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in |
1976 |
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10 |
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in |
1954 |
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| Direction |
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E |
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W |
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N |
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NW |
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NW |
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| High Heat Index |
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| Wind Chill |
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15 |
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6 |
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18 |
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-3 |
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-12 |
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in |
1976 |
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| Maximum Water Temp |
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41.0 |
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47.2 |
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46.6 |
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-5.6 |
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53.1 |
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in |
2011 |
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41.0 |
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in |
2018 |
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| Minimum
Water Temp |
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39.4 |
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42.0 |
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44.1 |
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-4.7 |
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50.5 |
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in |
2015 |
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39.2 |
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in |
2013 |
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| Average Water Temp |
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40.2 |
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44.6 |
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45.3 |
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-5.1 |
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50.8 |
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in |
2011 |
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40.2 |
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in |
2018 |
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| Sunrise/ AM Twilight |
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7:03:40 AM |
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6:32:26 AM |
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| Sunset /
PM Twilight |
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4:16:00 PM |
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4:47:13 PM |
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| Length Of Day |
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9:12:20 |
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| Special Conditions |
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None |
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| Comments |
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December 13, 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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41.1 |
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45.5 |
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44.8 |
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-3.7 |
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54.2 |
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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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27.4 |
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33.3 |
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31.1 |
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-3.7 |
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41.3 |
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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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34.2 |
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39.4 |
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37.9 |
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-3.7 |
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47.6 |
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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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1.93 |
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-.78 |
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6.64 |
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in |
1936 |
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.04 |
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in |
1911 |
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| Total Snow |
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T |
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1.4 |
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2.5 |
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-2.5 |
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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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396 |
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330 |
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349 |
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+47 |
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513 |
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in |
1893 |
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222 |
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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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30.9 |
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37.4 |
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36.7 |
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-5.7 |
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47.6 |
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in |
2015 |
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19.2 |
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in |
1989 |
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| Avg
Minimum Dew Point |
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16.8 |
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24.2 |
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19.7 |
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-2.9 |
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37.2 |
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in |
2015 |
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-0.6 |
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in |
1989 |
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| Average Dew Point |
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23.8 |
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30.8 |
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27.4 |
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-3.5 |
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42.4 |
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in |
2015 |
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9.3 |
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in |
1989 |
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December 13, 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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45.78 |
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+4.60 |
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62.96 |
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in |
1984 |
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27.07 |
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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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3.6 |
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+0.6 |
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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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1456 |
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1127 |
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1381 |
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+75 |
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1825 |
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in |
1904 |
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1017 |
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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 13, 2018 |
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| Climate Weather for December 13 |
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| Weather History For December 13 |
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| Weather Calendar |
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