Portsmouth Rhode Island Weather Almanac
Sunday, December 6, 2020
Mostly Cloudy early then Clear, Windy and Cooler
Climate Normal Period Climate Record Period  
1981- 2010   1893 - 2020  
    December 6, 2020     Record Record
Observed Daily Data   Observed   2019   Normal   Depart   Highest Lowest
Maximum Temperature   38   47   45   -7   62   in 2001   24   in 1902  
Minimum Temperature   30   29   31   -1   54   in 1999   11   in 1901  
Average Temperature   34   38   38   -4   58   in 2001   19   in 1902  
Precipitation   .00   T   .15   -.15   2.06   in 1945            
One Hour   .00   T           .50   in 1953            
Snow   0.0   0.0   0.2   -0.2   13.9   in 1981            
Snow Depth   0   1           8   in 2002            
HDD   31   27   27   +4   46   in 1902   7   in 2001  
CDD   0   0   0   +0   0   in   0   in    
Maximum Dew Point   32   41   37   -5   59   in 1982   12   in 1969  
Minimum Dew Point   22   19   22   -0   52   in 2011   2   in 1992  
Average  Dew Point   27   30   29   -2   54   in 2011   10   in 1969  
Maximum Humidity   83%   81%   88%   -5%   100%   in 2013   56%   in 1992  
Minimum Humidity   62%   60%   60%   +2%   95%   in 2014   32%   in 1958  
Average Humidity   73%   71%   74%   -2%   98%   in 1972   47%   in 1992  
Maximum Barometer   29.75   30.14   30.10   -00.35   30.63   in 1976   29.52   in 1997  
Minimum Barometer   29.51   29.90   29.76   -00.25   30.28   in 2004   28.85   in 1977  
Average Barometer   29.63   30.02   29.93   -00.30   30.46   in 1976   29.19   in 1977  
Average Wind   13.3   10.3   8.4   +4.9   20.7   in 2003   2.0   in 1974  
Direction   NW   SSW   NW       NNE         SW        
High Wind Gust   37   33   27   +10   52   in 1953   9   in 1974  
Direction   NW   NW   NW       SSW         S        
High Heat Index                                      
Wind Chill   20   21   22   -2             0   in 1954  
Maximum Water Temp   49.8   44.1   48.1   +1.7   53.0   in 2011   42.6   in 2007  
Minimum Water Temp   47.7   40.6   45.8   +1.9   51.8   in 2011   40.6   in 2019  
Average Water Temp   48.8   42.4   46.9   +1.8   52.4   in 2011   41.7   in 2007  
Sunrise/ AM Twilight   6:58:18 AM   6:27:17 AM            
Sunset / PM Twilight   4:15:24 PM   4:46:25 PM            
Length Of Day   9:17:06                          
Special Conditions   None                                  
Comments      
    December 6, 2020     Record Record
Month-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
 Avg Maximum Temperature   49.8   40.5   46.0   +3.8   59.2   in 2001   33.0   in 1904  
Avg Minimum Temperature   37.3   27.8   32.3   +5.0   45.3   in 2001   14.5   in 1989  
Average Temperature   43.8   34.5   39.2   +4.7   52.7   in 2001   24.8   in 1976  
Total Precipitation   2.53   .79   .90   +1.63   4.15   in 1981   .00   in 2000  
Total Snow   T   4.2   1.1   -1.1   17.0   in 1981   0.0   in 2018  
Total HDD   127   183   154   -27   241   in 1976   74   in 2001  
Total CDD   0   0   0   +0   0   in         in    
Avg Maximum Dew Point   42.7   34.3   38.0   +4.7   52.7   in 1982   16.0   in 1976  
Avg Minimum Dew Point   28.5   19.5   23.3   +5.2   39.8   in 1982   -2.7   in 1989  
Average  Dew Point   35.8   27.2   30.6   +5.2   46.3   in 1982   9.3   in 1989  
    December 6, 2020     Record Record
Year-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
Total Precipitation   39.41   50.29   44.88   -5.47   61.67   in 1983   24.19   in 1957  
Total Snow (since Jul 1 20)   0.6   4.2   2.2   -1.6   19.5   in 1898   0.0   in 2017  
Total HDD (since Jul 1 20)   920   1173   1186   -266   1534   in 1904   888   in 2011  
Total CDD (since Jan 1)   871   731   563   +308   871   in 2020   290   in 1902  
                                   
Hour-by-Hour Weather For December 6, 2020  
Climate Weather for December 6  
Weather History For December 6  
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