| Portsmouth Rhode Island
Weather Almanac |
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| Sunday, December 30, 2018 |
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| Partly Cloudy to Clear PM, Light Winds, Seasonal Temperatures |
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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 30, 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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37 |
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20 |
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39 |
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-2 |
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60 |
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in |
1984 |
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5 |
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in |
1917 |
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| Minimum
Temperature |
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28 |
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10 |
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24 |
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+4 |
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48 |
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in |
1948 |
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-10 |
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in |
1917 |
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| Average Temperature |
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33 |
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15 |
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32 |
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+1 |
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52 |
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in |
1948 |
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-3 |
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in |
1917 |
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| Precipitation |
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.00 |
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.09 |
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.13 |
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-.13 |
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1.61 |
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in |
1912 |
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| One Hour |
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.00 |
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.00 |
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.39 |
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in |
2000 |
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| Snow |
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0.0 |
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1.8 |
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0.3 |
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-0.3 |
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5.8 |
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in |
1993 |
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| Snow
Depth |
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0 |
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0 |
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15 |
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in |
1947 |
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| HDD |
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32 |
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50 |
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33 |
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-1 |
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68 |
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in |
1917 |
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13 |
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in |
1948 |
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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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16 |
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30 |
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-4 |
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53 |
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in |
1984 |
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-3 |
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in |
1987 |
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| Minimum
Dew Point |
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21 |
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0 |
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14 |
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+7 |
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42 |
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in |
1990 |
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-16 |
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in |
1962 |
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| Average Dew Point |
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24 |
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8 |
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22 |
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+2 |
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47 |
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in |
1990 |
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-7 |
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in |
1987 |
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| Maximum Humidity |
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87% |
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88% |
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85% |
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+2% |
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100% |
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in |
2005 |
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38% |
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in |
1949 |
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| Minimum
Humidity |
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57% |
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53% |
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52% |
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+5% |
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96% |
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in |
1992 |
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16% |
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in |
1994 |
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| Average Humidity |
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72% |
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71% |
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69% |
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+3% |
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98% |
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in |
1992 |
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30% |
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in |
1994 |
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| Maximum Barometer |
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30.30 |
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30.18 |
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30.15 |
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+00.15 |
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30.68 |
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in |
2006 |
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29.33 |
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in |
1997 |
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| Minimum
Barometer |
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30.13 |
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29.91 |
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29.81 |
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+00.32 |
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30.40 |
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in |
1972 |
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28.89 |
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in |
1997 |
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| Average Barometer |
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30.22 |
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30.05 |
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29.98 |
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+00.24 |
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30.50 |
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in |
1978 |
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29.11 |
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in |
1997 |
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| Average Wind |
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4.1 |
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5.3 |
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8.6 |
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-4.5 |
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25.7 |
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in |
1962 |
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2.2 |
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in |
2004 |
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| Direction |
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W |
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WNW |
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NW |
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NW |
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N |
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| High Wind Gust |
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18 |
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19 |
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26 |
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-8 |
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70 |
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in |
1962 |
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11 |
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in |
2004 |
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| Direction |
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NNW |
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WNW |
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NW |
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NW |
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NNW |
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| High Heat Index |
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| Wind Chill |
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23 |
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-1 |
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15 |
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+8 |
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-30 |
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in |
1962 |
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| Maximum Water Temp |
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42.1 |
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37.8 |
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43.3 |
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-1.2 |
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48.9 |
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in |
2006 |
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37.8 |
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in |
2017 |
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| Minimum
Water Temp |
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40.5 |
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33.6 |
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40.7 |
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-0.2 |
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46.3 |
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in |
2015 |
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33.6 |
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in |
2017 |
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| Average Water Temp |
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41.3 |
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35.7 |
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42.0 |
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-0.7 |
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47.0 |
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in |
2015 |
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35.7 |
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in |
2017 |
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| Sunrise/ AM Twilight |
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7:11:25 AM |
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6:40:15 AM |
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| Sunset /
PM Twilight |
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4:24:55 PM |
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4:56:06 PM |
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| Length Of Day |
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9:13:30 |
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| Special Conditions |
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None |
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| Comments |
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December 30, 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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43.1 |
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38.9 |
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42.2 |
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+0.9 |
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54.1 |
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in |
2015 |
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30.3 |
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in |
1989 |
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| Avg
Minimum Temperature |
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30.3 |
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27.0 |
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28.3 |
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+2.0 |
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41.5 |
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in |
2015 |
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14.3 |
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in |
1989 |
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| Average Temperature |
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36.7 |
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32.9 |
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35.2 |
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+1.5 |
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47.8 |
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in |
2015 |
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22.3 |
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in |
1989 |
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| Total
Precipitation |
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3.85 |
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2.34 |
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4.22 |
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-.37 |
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9.45 |
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in |
1936 |
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.58 |
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in |
1955 |
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| Total Snow |
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0.2 |
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8.1 |
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7.3 |
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-7.1 |
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22.3 |
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in |
1904 |
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T |
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in |
2011 |
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| Total
HDD |
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841 |
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955 |
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886 |
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-45 |
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1276 |
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in |
1989 |
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507 |
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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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35.7 |
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30.6 |
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34.1 |
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+1.6 |
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49.4 |
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in |
2015 |
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15.6 |
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in |
1989 |
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| Avg
Minimum Dew Point |
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20.9 |
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16.8 |
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17.4 |
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+3.5 |
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36.1 |
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in |
2015 |
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-0.7 |
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in |
1989 |
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| Average Dew Point |
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28.3 |
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23.7 |
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25.3 |
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+3.0 |
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42.7 |
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in |
2015 |
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7.4 |
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in |
1989 |
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December 30, 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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53.08 |
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41.45 |
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48.07 |
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+5.01 |
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65.49 |
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in |
1983 |
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27.66 |
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in |
1965 |
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| Total
Snow (since Jul 1 18) |
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4.4 |
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8.1 |
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8.4 |
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-4.0 |
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23.7 |
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in |
1904 |
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T |
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in |
1999 |
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| Total HDD (since Jul 1
18) |
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1901 |
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1752 |
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1918 |
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-17 |
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2448 |
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in |
1904 |
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1302 |
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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 30, 2018 |
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| Climate Weather for December 30 |
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| Weather History For December 30 |
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| Weather Calendar |
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