| Portsmouth Rhode Island
Weather Almanac |
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| Friday, December 21, 2018 |
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| Cloudy, Rainy, Foggy, Windy and Very Warm |
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| Climate Normal
Period |
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Climate Record Period |
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| 1981- 2010 |
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1893 - 2018 |
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December 21, 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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57 |
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37 |
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40 |
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+17 |
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58 |
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in |
1999 |
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13 |
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in |
1955 |
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| Minimum
Temperature |
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49 |
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28 |
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26 |
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+23 |
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49 |
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in |
2018 |
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-3 |
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in |
1955 |
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| Average Temperature |
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53 |
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33 |
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33 |
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+20 |
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53 |
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in |
2018 |
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5 |
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in |
1955 |
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| Precipitation |
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.66 |
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.00 |
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.14 |
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+.52 |
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2.05 |
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in |
1946 |
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| One Hour |
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.09 |
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.00 |
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.59 |
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in |
1993 |
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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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7.2 |
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in |
1954 |
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| Snow
Depth |
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0 |
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0 |
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20 |
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in |
2009 |
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| HDD |
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12 |
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32 |
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32 |
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-20 |
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60 |
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in |
1955 |
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12 |
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in |
2018 |
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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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57 |
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21 |
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32 |
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+25 |
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57 |
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in |
2018 |
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-12 |
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in |
1955 |
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| Minimum
Dew Point |
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45 |
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14 |
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16 |
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+29 |
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45 |
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in |
2018 |
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-23 |
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in |
1955 |
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| Average Dew Point |
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51 |
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18 |
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24 |
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+27 |
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51 |
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in |
2018 |
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-18 |
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in |
1955 |
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| Maximum Humidity |
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100% |
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70% |
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84% |
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+16% |
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100% |
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in |
2018 |
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44% |
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in |
1955 |
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| Minimum
Humidity |
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84% |
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43% |
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57% |
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+27% |
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96% |
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in |
1972 |
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22% |
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in |
1955 |
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| Average Humidity |
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92% |
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57% |
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70% |
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+22% |
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98% |
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in |
1972 |
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33% |
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in |
1955 |
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| Maximum Barometer |
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29.97 |
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30.30 |
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30.16 |
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-00.19 |
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30.94 |
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in |
1983 |
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29.42 |
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in |
1978 |
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| Minimum
Barometer |
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29.34 |
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30.00 |
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29.82 |
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-00.48 |
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30.50 |
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in |
1983 |
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28.95 |
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in |
1973 |
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| Average Barometer |
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29.66 |
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30.15 |
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29.99 |
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-00.34 |
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30.72 |
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in |
1983 |
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29.21 |
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in |
1976 |
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| Average Wind |
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16.3 |
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4.8 |
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9.0 |
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+7.3 |
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18.6 |
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in |
1976 |
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2.7 |
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in |
1956 |
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| Direction |
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SSE |
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WNW |
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WNW |
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WNW |
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SW |
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| High Wind Gust |
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38 |
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15 |
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27 |
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+11 |
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48 |
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in |
1957 |
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12 |
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in |
1983 |
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| Direction |
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SE |
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WNW |
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WNW |
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S |
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NE |
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| High Heat Index |
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| Wind Chill |
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44 |
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22 |
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16 |
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+28 |
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-25 |
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in |
1955 |
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| Maximum Water Temp |
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44.8 |
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44.8 |
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45.0 |
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-0.2 |
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50.2 |
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in |
2006 |
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41.4 |
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in |
2010 |
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| Minimum
Water Temp |
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41.4 |
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41.2 |
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42.3 |
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-0.9 |
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47.2 |
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in |
2011 |
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37.2 |
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in |
2004 |
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| Average Water Temp |
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43.1 |
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43.0 |
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43.6 |
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-0.5 |
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48.4 |
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in |
2011 |
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39.4 |
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in |
2004 |
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| Sunrise/ AM Twilight |
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7:08:34 AM |
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6:37:14 AM |
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| Sunset /
PM Twilight |
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4:18:56 PM |
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4:50:15 PM |
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| Length Of Day |
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9:10:22 |
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| Special Conditions |
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Dense Fog |
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| Comments |
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December 21, 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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42.9 |
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42.4 |
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43.4 |
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-0.5 |
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53.3 |
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in |
2015 |
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31.6 |
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in |
1904 |
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| Avg
Minimum Temperature |
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30.0 |
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30.0 |
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29.7 |
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+0.3 |
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40.7 |
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in |
2015 |
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16.0 |
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in |
1989 |
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| Average Temperature |
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36.5 |
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36.2 |
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36.5 |
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-0.0 |
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47.0 |
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in |
2015 |
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24.4 |
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in |
1989 |
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| Total
Precipitation |
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2.61 |
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1.31 |
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3.05 |
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-.44 |
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9.27 |
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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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4.6 |
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-4.6 |
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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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593 |
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599 |
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593 |
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+0 |
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849 |
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in |
1989 |
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371 |
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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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35.2 |
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33.9 |
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35.4 |
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-0.2 |
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47.8 |
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in |
2015 |
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17.8 |
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in |
1989 |
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| Avg
Minimum Dew Point |
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20.9 |
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20.5 |
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18.3 |
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+2.6 |
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35.1 |
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in |
2015 |
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-0.4 |
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in |
1989 |
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| Average Dew Point |
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28.0 |
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27.2 |
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26.1 |
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+2.0 |
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41.4 |
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in |
2015 |
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8.7 |
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in |
1989 |
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December 21, 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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51.84 |
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40.42 |
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46.90 |
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+4.94 |
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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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5.7 |
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-1.5 |
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21.3 |
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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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1653 |
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1396 |
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1625 |
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+28 |
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2137 |
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in |
1904 |
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1166 |
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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 21, 2018 |
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| Climate Weather for December 21 |
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| Weather History For December 21 |
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| Weather Calendar |
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