| Portsmouth Rhode Island
Weather Almanac |
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| Wednesday, December 19, 2018 |
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| Clear early, Partly Cloudy Day to Clear Evening, 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 19, 2018 |
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Record |
Record |
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| Observed Daily Data |
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Observed |
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2018 |
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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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52 |
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41 |
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-2 |
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57 |
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in |
1899 |
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19 |
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in |
1919 |
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| Minimum
Temperature |
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22 |
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36 |
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27 |
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-5 |
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41 |
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in |
1996 |
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3 |
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in |
1919 |
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| Average Temperature |
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31 |
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44 |
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34 |
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-3 |
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48 |
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in |
1899 |
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11 |
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in |
1919 |
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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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1.95 |
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in |
1986 |
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| One Hour |
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.00 |
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.00 |
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.41 |
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in |
1986 |
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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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8.8 |
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in |
2008 |
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| Snow
Depth |
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0 |
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T |
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18 |
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in |
1904 |
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| HDD |
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34 |
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21 |
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31 |
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+3 |
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54 |
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in |
1919 |
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17 |
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in |
1899 |
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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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28 |
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41 |
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33 |
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-5 |
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54 |
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in |
1990 |
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4 |
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in |
1991 |
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| Minimum
Dew Point |
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13 |
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34 |
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17 |
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-4 |
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41 |
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in |
1996 |
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-14 |
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in |
1979 |
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| Average Dew Point |
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21 |
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38 |
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25 |
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-4 |
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45 |
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in |
1996 |
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0 |
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in |
1979 |
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| Maximum Humidity |
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77% |
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93% |
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83% |
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-6% |
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100% |
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in |
2001 |
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57% |
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in |
1978 |
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| Minimum
Humidity |
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37% |
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63% |
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54% |
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-17% |
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96% |
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in |
1993 |
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33% |
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in |
2009 |
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| Average Humidity |
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57% |
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78% |
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69% |
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-12% |
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98% |
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in |
1993 |
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46% |
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in |
1978 |
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| Maximum Barometer |
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30.14 |
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29.89 |
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30.16 |
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-00.02 |
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30.74 |
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in |
1991 |
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29.68 |
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in |
1963 |
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| Minimum
Barometer |
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30.05 |
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29.63 |
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29.83 |
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+00.22 |
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30.46 |
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in |
1964 |
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29.25 |
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in |
1969 |
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| Average Barometer |
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30.10 |
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29.76 |
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30.00 |
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+00.10 |
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30.55 |
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in |
1964 |
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29.51 |
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in |
1986 |
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| Average Wind |
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5.6 |
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7.5 |
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8.1 |
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-2.5 |
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18.5 |
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in |
1977 |
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3.0 |
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in |
2007 |
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| Direction |
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WNW |
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SW |
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WNW |
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NE |
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E |
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| High Wind Gust |
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21 |
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26 |
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26 |
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-5 |
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49 |
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in |
1986 |
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14 |
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in |
2004 |
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| Direction |
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NW |
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SW |
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WNW |
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ENE |
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NW |
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| High Heat Index |
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| Wind Chill |
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12 |
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26 |
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13 |
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-1 |
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-11 |
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in |
1979 |
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| Maximum Water Temp |
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40.6 |
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43.8 |
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45.6 |
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-5.0 |
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50.4 |
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in |
2006 |
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40.6 |
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in |
2018 |
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| Minimum
Water Temp |
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37.9 |
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42.2 |
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42.7 |
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-4.8 |
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48.7 |
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in |
2015 |
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37.9 |
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in |
2018 |
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| Average Water Temp |
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39.3 |
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43.0 |
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44.1 |
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-4.9 |
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49.5 |
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in |
2015 |
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39.3 |
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in |
2018 |
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| Sunrise/ AM Twilight |
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7:07:32 AM |
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6:36:13 AM |
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| Sunset /
PM Twilight |
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4:17:59 PM |
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4:49:18 PM |
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| Length Of Day |
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9:10:27 |
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| Special Conditions |
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None |
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| Comments |
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December 19, 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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41.8 |
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42.4 |
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43.7 |
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-1.9 |
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53.8 |
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in |
2015 |
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31.3 |
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in |
1904 |
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| Avg
Minimum Temperature |
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28.8 |
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30.0 |
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30.0 |
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-1.2 |
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41.4 |
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in |
2015 |
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16.2 |
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in |
1989 |
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| Average Temperature |
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35.3 |
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36.2 |
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36.8 |
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-1.5 |
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47.6 |
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in |
2015 |
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24.8 |
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in |
1989 |
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| Total
Precipitation |
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1.95 |
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1.31 |
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2.77 |
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-.82 |
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7.88 |
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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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4.0 |
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-4.0 |
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21.3 |
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in |
1981 |
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0.0 |
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in |
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| Total
HDD |
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558 |
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543 |
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530 |
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+28 |
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761 |
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in |
1989 |
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325 |
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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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33.5 |
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34.3 |
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35.7 |
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-2.2 |
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48.5 |
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in |
2015 |
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17.9 |
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in |
1989 |
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| Avg
Minimum Dew Point |
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19.3 |
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20.8 |
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18.7 |
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+0.6 |
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36.2 |
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in |
2015 |
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-0.2 |
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in |
1989 |
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| Average Dew Point |
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26.4 |
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27.6 |
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26.4 |
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+0.0 |
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42.3 |
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in |
2015 |
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8.9 |
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in |
1989 |
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December 19, 2018 |
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Record |
Record |
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| Year-to-Date Summary |
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Observed |
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2017 |
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Normal |
Depart |
Highest |
Lowest |
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| Total Precipitation |
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51.18 |
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40.42 |
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46.62 |
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+4.56 |
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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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5.1 |
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-0.9 |
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21.3 |
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in |
1981 |
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0.0 |
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in |
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| Total HDD (since Jul 1
18) |
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1618 |
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1340 |
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1562 |
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+56 |
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2066 |
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in |
1904 |
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1120 |
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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 19, 2018 |
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| Climate Weather for December 19 |
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| Weather History For December 19 |
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| Weather Calendar |
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| Back To Weather Stat Page |
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