Portsmouth Rhode Island Weather Almanac
Friday, December 7, 2018
Mostly Cloudy and Light Snow Flurry early then Clear, Dry, Windy and Cold
Climate Normal Period Climate Record Period  
1981- 2010   1893 - 2018  
    December 7, 2018     Record Record
Observed Daily Data   Observed   2017   Normal   Depart   Highest Lowest
Maximum Temperature   38   47   45   -7   67   in 1998   26   in 1954  
Minimum Temperature   25   36   31   -6   51   in 1932   11   in 1906  
Average Temperature   32   42   38   -6   58   in 1998   21   in 1954  
Precipitation   T   .00   .15   .00   2.10   in 1908            
One Hour   .00   .00           .61   in 1996            
Snow   T   0.0   0.2   -0.2   1.7   in 1922            
Snow Depth   0   0           17   in 1981            
HDD   33   23   27   +6   44   in 1954   7   in 1998  
CDD   0   0   0   +0   0   in              
Maximum Dew Point   32   28   37   -5   59   in 1953   11   in 1958  
Minimum Dew Point   11   20   22   -11   46   in 2011   -4   in 1989  
Average  Dew Point   22   24   29   -7   51   in 2011   8   in 1958  
Maximum Humidity   89%   65%   86%   +3%   100%   in 2004   53%   in 1958  
Minimum Humidity   34%   37%   54%   -20%   95%   in 2011   28%   in 1988  
Average Humidity   62%   51%   70%   -8%   97%   in 2004   46%   in 1995  
Maximum Barometer   30.39   30.01   30.11   +00.28   30.66   in 1935   29.45   in 1962  
Minimum Barometer   30.12   29.89   29.79   +00.33   30.26   in 1950   29.05   in 1959  
Average Barometer   30.26   29.95   29.95   +00.31   30.41   in 1950   29.28   in 1959  
Average Wind   11.4   7.9   8.5   +2.9   24.4   in 1983   0.6   in 2012  
Direction   WNW   W   W       W         SSW        
High Wind Gust   28   19   27   +1   68   in 1953   7   in 1990  
Direction   NW   SW   W       SSW         WNW        
High Heat Index                                      
Wind Chill   14   32   22   -8             -1   in 1989  
Maximum Water Temp   43.9   50.0   47.9   -4.0   53.8   in 2011   42.8   in 2007  
Minimum Water Temp   41.4   48.1   45.4   -4.0   52.7   in 2011   40.8   in 2000  
Average Water Temp   42.7   49.1   46.6   -4.0   53.3   in 2011   41.9   in 2007  
Sunrise/ AM Twilight   6:58:45 AM   6:27:43 AM            
Sunset / PM Twilight   4:15:24 PM   4:46:26 PM            
Length Of Day   9:16:39                          
Special Conditions   None                                  
Comments      
    December 7, 2018     Record Record
Month-to-Date Summary   Observed   2017   Normal Depart Highest Lowest
 Avg Maximum Temperature   45.3   50.0   45.9   -0.6   59.1   in 1998   32.6   in 1954  
Avg Minimum Temperature   31.1   35.6   32.1   -1.0   45.3   in 2001   14.9   in 1989  
Average Temperature   38.2   42.8   39.0   -0.8   52.1   in 2001   25.3   in 1926  
Total Precipitation   1.15   .55   1.05   +.10   4.15   in 1981   .00   in 2000  
Total Snow   T   0.0   1.3   -1.3   17.0   in 1981   0.0   in    
Total HDD   185   154   181   +4   277   in 1926   87   in 2001  
Total CDD   0   0   0   +0   807   in 2016   290   in 1902  
Avg Maximum Dew Point   37.0   42.0   37.8   -0.8   51.4   in 1982   21.3   in 1976  
Avg Minimum Dew Point   22.3   27.7   20.6   +1.7   37.7   in 2001   -2.9   in 1989  
Average  Dew Point   29.6   34.9   28.3   +1.4   44.1   in 2001   10.6   in 1989  
    December 7, 2018     Record Record
Year-to-Date Summary   Observed   2017   Normal Depart Highest Lowest
Total Precipitation   50.38   39.66   44.90   +5.48   61.79   in 1983   24.35   in 1957  
Total Snow (since Jul 1 18)   4.2   0.0   2.4   +1.8   19.5   in 1898   0.0   in    
Total HDD (since Jul 1 18)   1245   951   1213   +32   1568   in 1904   901   in 2011  
Total CDD (since Jan 1)   775   580   563   +212   807   in 2016   290   in 1902  
                             
Hour-by-Hour Weather For December 7, 2018  
Climate Weather for December 7  
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