Portsmouth Rhode Island Weather Almanac
Tuesday, December 8, 2020
Cloudy to Mostly Cloudy PM, Windy and Much Colder
Climate Normal Period Climate Record Period  
1981- 2010   1893 - 2020  
    December 8, 2020     Record Record
Observed Daily Data   Observed   2019   Normal   Depart   Highest Lowest
Maximum Temperature   31   45   44   -13   62   in 1951   16   in 1906  
Minimum Temperature   27   18   31   -4   49   in 1974   4   in 1906  
Average Temperature   29   32   38   -9   54   in 1951   10   in 1906  
Precipitation   .00   .00   .15   -.15   1.01   in 1950            
One Hour   .00   .00           .32   in 1996            
Snow   0.0   0.0   0.2   -0.2   2.3   in 2000            
Snow Depth   0   0           14   in 1981            
HDD   36   33   28   +8   55   in 1906   11   in 1951  
CDD   0   0   0   +0   0   in   0   in    
Maximum Dew Point   24   38   36   -12   59   in 1951   -2   in 1989  
Minimum Dew Point   19   15   21   -2   46   in 1974   -6   in 1989  
Average  Dew Point   22   27   29   -7   49   in 1974   -4   in 1989  
Maximum Humidity   85%   87%   82%   +3%   100%   in 2012   43%   in 1989  
Minimum Humidity   66%   63%   53%   +13%   93%   in 2012   24%   in 1979  
Average Humidity   76%   75%   68%   +8%   97%   in 2012   37%   in 1989  
Maximum Barometer   29.81   30.56   30.20   -00.39   30.69   in 2014   29.46   in 1981  
Minimum Barometer   29.62   30.36   29.87   -00.25   30.42   in 2013   29.20   in 2011  
Average Barometer   29.72   30.46   30.04   -00.32   30.55   in 2014   29.40   in 1981  
Average Wind   10.7   5.8   7.7   +3.0   16.8   in 1961   1.3   in 1967  
Direction   NNW   SSW   NW       NW         SSE        
High Wind Gust   31   18   25   +6   54   in 1979   10   in 1967  
Direction   NNW   S   NW       WNW         E        
High Heat Index                                      
Wind Chill   17   14   20   -3             1   in 2008  
Maximum Water Temp   48.7   43.2   47.3   +1.4   53.5   in 2011   43.0   in 2007  
Minimum Water Temp   45.7   40.1   44.3   +1.4   51.1   in 2011   39.4   in 2000  
Average Water Temp   47.2   41.7   45.8   +1.4   52.3   in 2011   41.7   in 2019  
Sunrise/ AM Twilight   7:00:04 AM   6:28:59 AM            
Sunset / PM Twilight   4:15:25 PM   4:46:30 PM            
Length Of Day   9:15:21                          
Special Conditions   None                                  
Comments   1st high temp below 32° for the season  
    December 8, 2020     Record Record
Month-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
 Avg Maximum Temperature   45.8   40.5   45.6   +0.1   57.9   in 1998   32.9   in 1954  
Avg Minimum Temperature   34.9   26.4   32.0   +2.9   44.3   in 1998   15.0   in 1989  
Average Temperature   40.5   33.8   38.9   +1.6   51.3   in 1998   25.6   in 1989  
Total Precipitation   2.53   .79   1.20   +1.33   4.37   in 1996   .00   in 1988  
Total Snow   T   4.2   1.5   -1.5   17.0   in 1981   0.0   in 2017  
Total HDD   196   250   209   -13   315   in 1989   110   in 1998  
Total CDD   0   0   0   +0   0   in         in    
Avg Maximum Dew Point   38.0   34.0   37.6   +0.4   49.1   in 1982   20.9   in 1989  
Avg Minimum Dew Point   26.3   18.4   22.8   +3.4   36.3   in 2001   -3.3   in 1989  
Average  Dew Point   32.4   26.5   30.2   +2.2   42.4   in 2001   8.8   in 1989  
    December 8, 2020     Record Record
Year-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
Total Precipitation   39.41   50.29   45.18   -5.77   61.79   in 1983   24.39   in 1957  
Total Snow (since Jul 1 20)   0.6   4.2   2.6   -2.0   19.5   in 1898   0.0   in 2017  
Total HDD (since Jul 1 20)   989   1240   1241   -252   1603   in 1904   924   in 2011  
Total CDD (since Jan 1)   871   731   563   +308   871   in 2020   290   in 1902  
                                   
Hour-by-Hour Weather For December 8, 2020  
Climate Weather for December 8  
Weather History For December 8  
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