Portsmouth Rhode Island Weather Almanac  
Wednesday, December 13, 2023  
Clear, Windy, Slightly Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    December 13, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   45   40   44   +1   60   in 1983   17   in 1960  
Minimum Temperature   33   24   31   +2   49   in 2015   6   in 1893  
Average Temperature   39   32   37   +2   55   in 1983   13   in 1960  
 Month Avg Max Temperature   47.5   45.6   45.2   +2.3   54.2   in 1953   30.8   in 1904  
Month Avg Min Temperature   35.8   33.8   32.2   +3.5   41.3   in 2015   16.5   in 1989  
Month Average Temperature   41.9   39.9   38.6   +3.3   47.9   in 2015   25.5   in 1904  
High Heat Index                   #N/A   in #N/A            
Low Wind Chill   23   16   19   +4             -11   in 1960  
Heating Degree Days   26   33   28   -2   52   in 1960   10   in 1983  
Month Heating DD   300   326   342   -42   513   in 1904   222   in 2015  
Season Heating DD   1241   1147   1332   -91   1825   in 1904   1017   in 2015  
Cooling Degree Days   0   0   0   +0       in     0   in Many  
Month Cooling DD   0   0   0   +0   3   in 2022   0   in Many  
Year Cooling DD   726   784   609   +117   871   in 2020   290   in 1902  
Maximum Dew Point   32   22   37   -5   58   in 1983   -1   in 1960  
Minimum Dew Point   20   17   22   -2   45   in 1983   -16   in 1976  
Average  Dew Point   26   20   29   -3   52   in 1983   -6   in 1960  
 Month Avg Max Dew Point   41.9   39.8   36.7   +5.3   47.6   in 2015   19.2   in 1989  
Month Avg Min Dew Point   31.2   25.2   21.7   +9.4   37.2   in 2015   -0.6   in 1989  
Month Average Dew Point   36.8   32.7   29.2   +7.6   42.6   in 2015   9.3   in 1989  
Precipitation   .00   .00   .15   -.15   2.43   in 1915            
One Hour Rain   .00   .00           .27   in 1983            
Half Hour Rain   .00   .00           .14   in 2009            
Hourly Rain Rate   .00   .00           1.30   in 2009            
Month Precipitation   2.43   1.96   1.96   +.47   6.64   in 1936   .04   in 1911  
Year Precipitation   51.48   39.77   43.39   +8.09   62.96   in 1983   27.07   in 1965  
Snow   0.0   0.0   0.2   -0.2   5.4   in 2007            
Snow Depth   0   0   0   -0   9   in 1970            
Month Snow   0.1   1.5   2.2   -2.1   17.0   in 1981   0.0   in 2015  
Season Snow   0.1   1.5   2.8   +2.8   21.1   in 1898   0.0   in 2015  
    December 13, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   82%   78%   86%   -4%   100%   in 2020   57%   in 1989  
Minimum Humidity   39%   44%   55%   -16%   90%   in 1965   27%   in 1989  
Average Humidity   61%   61%   71%   -10%   95%   in 1965   42%   in 1989  
Maximum Barometer   30.47   30.20   30.18   +00.29   30.82   in 1975   29.24   in 2010  
Minimum Barometer   30.32   29.99   29.86   +00.46   30.53   in 1994   29.06   in 2010  
Average Barometer   30.40   30.10   30.02   +00.37   30.65   in 1975   29.15   in 2010  
Average Wind   9.0   10.0   8.0   +1.0   21.4   in 1976   1.7   in 1954  
Direction   WNW   NW   WSW       NW NW
High Wind Gust   29   26   25   +4   62   in 1976   10   in 1954  
Direction   NW   NW   NW       NW NW
Maximum Water Temp   48.6   46.2   46.7   +1.9   53.1   in 2011   41.0   in 2018  
Minimum Water Temp   46.0   44.4   44.3   +1.7   50.5   in 2015   39.2   in 2013  
Average Water Temp   47.3   45.3   45.5   +1.8   50.8   in 2011   40.2   in 2018  
Sunrise/ AM Twilight   7:02:56 AM   6:33:39 AM            
Sunset / PM Twilight   4:15:19 PM   4:45:05 PM            
Length Of Day   9:12:23                          
Special Conditions   None                              
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