Portsmouth Rhode Island Weather Almanac  
Saturday, December 25, 2021  
Cloudy, Rainy and Foggy, Light Winds and Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    December 25, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   42   57   41   +1   65   in 2015   12   in 1983  
Minimum Temperature   29   36   28   +1   54   in 2015   -4   in 1980  
Average Temperature   36   47   35   +1   60   in 2015   8   in 1983  
 Month Avg Max Temperature   46.9   43.4   43.8   +3.0   54.9   in 2015   30.9   in 1989  
Month Avg Min Temperature   33.6   31.6   30.7   +2.9   42.5   in 2015   14.2   in 1989  
Month Average Temperature   40.5   37.8   37.2   +3.3   49.0   in 2015   22.8   in 1989  
High Heat Index                                      
Low Wind Chill   26   28   14   +12             -31   in 1980  
Heating Degree Days   29   18   30   -1   57   in 1983   5   in 2015  
Month HDD   612   680   692   -80   1056   in 1989   399   in 2015  
Season HDD   1406   1473   1682   -276   2282   in 1904   1194   in 2015  
Cooling Degree Days   0   0   0   +0       in         in    
Month CDD   0   0   0   +0   0   in         in    
Year Cooling Degree Days   795   871   609   +186   871   in 2020   290   in 1902  
Maximum Dew Point   41   57   34   +7   59   in 2014   -6   in 1983  
Minimum Dew Point   26   28   18   +8   50   in 2015   -28   in 1980  
Average  Dew Point   34   43   26   +8   54   in 2015   -11   in 1983  
 Month Avg Max Dew Point   40.4   37.4   34.8   +5.6   49.8   in 2015   15.3   in 1989  
Month Avg Min Dew Point   21.4   24.2   19.4   +2.0   37.5   in 2015   -1.4   in 1989  
Month Average Dew Point   31.1   31.0   27.1   +4.0   43.8   in 2015   7.0   in 1989  
Precipitation   .25   1.83   .14   +.11   1.83   in 2020            
One Hour   .08   .48           .48   in 2020            
Hourly Rate   .17   3.49           3.49   in 2020            
Month Precipitation   1.33   6.08   3.72   -2.39   9.27   in 1936   .45   in 1943  
Year Precipitation   46.91   42.96   45.15   +1.76   65.27   in 1983   27.52   in 1965  
Snow   0.0   0.0   0.2   -0.2   3.6   in 1909       in    
Snow Depth   T   T           10   in 2009       in    
Month Snow   0.8   7.4   4.7   -3.9   21.3   in 1981   0.0   in 2015  
Season Snow   0.8   8.0   5.3   -4.5   21.3   in 1898   0.0   in 2015  
    December 25, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   99%   99%   86%   +13%   100%   in 2015   48%   in 1983  
Minimum Humidity   85%   68%   54%   +31%   88%   in 1982   19%   in 1968  
Average Humidity   92%   84%   70%   +22%   94%   in 1982   39%   in 1968  
Maximum Barometer   29.95   29.91   30.15   -00.20   30.97   in 1949   29.48   in 1966  
Minimum Barometer   29.47   29.58   29.77   -00.30   30.68   in 1949   28.74   in 1978  
Average Barometer   29.71   29.75   29.96   -00.25   30.83   in 1949   29.20   in 1978  
Average Wind   3.8   12.5   8.4   -4.6   21.0   in 1966   1.4   in 2015  
Direction   NW   SSE   WNW       W         SE        
High Wind Gust   14   37   27   -13   52   in 1966   9   in 2015  
Direction   NNW   S   NW       W         SSE        
Maximum Water Temp   47.5   47.7   44.6   +2.9   51.1   in 2015   40.2   in 2019  
Minimum Water Temp   44.2   45.7   42.3   +2.0   50.2   in 2015   34.5   in 2000  
Average Water Temp   45.9   46.7   43.4   +2.4   50.7   in 2015   37.6   in 2000  
Sunrise/ AM Twilight   7:10:07 AM   6:40:23 AM            
Sunset / PM Twilight   4:20:35 PM   4:50:20 PM            
Length Of Day   9:10:28                          
Special Conditions   Dense Fog                              
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