Portsmouth Rhode Island Weather Almanac  
Monday, June 12, 2023  
Mostly Cloudy early, Partly Cloudy Day to Cloudy,Rain and Fog PM, Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    June 12, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   76   72   73   +3   88   in 1933   56   in 2000  
Minimum Temperature   60   62   57   +3   68   in 1973   42   in 1980  
Average Temperature   68   67   65   +3   75   in 2017   54   in 2000  
 Month Avg Max Temperature   69.5   73.5   71.1   -1.6   79.3   in 1925   60.5   in 1907  
Month Avg Min Temperature   52.3   57.1   54.8   -2.6   60.5   in 2008   46.9   in 1907  
Month Average Temperature   61.1   65.4   63.1   -2.0   69.3   in 1925   53.8   in 1907  
High Heat Index   78   72           93   in 1933            
Low Wind Chill                             39   in 1980  
Heating Degree Days   0   0   2   -2   11   in 2000   0   in 2023  
Month Heating DD   54   10   34   +20   134   in 1907   2   in 1936  
Season Heating DD   4776   4995   5462   -686   6600   in 1905   4403   in 1932  
Cooling Degree Days   3   2   2   +1   10   in 2017   0   in 2021  
Month Cooling DD   7   15   15   -8   67   in 2008   0   in 2003  
Year Cooling DD   16   38   26   -10   76   in 1991   0   in 2003  
Maximum Dew Point   68   64   62   +6   71   in 1973   44   in 1950  
Minimum Dew Point   59   59   52   +7   63   in 1996   34   in 1972  
Average  Dew Point   64   62   57   +7   67   in 1996   41   in 1950  
 Month Avg Max Dew Point   58.6   61.8   60.2   -1.6   65.7   in 2021   48.4   in 1988  
Month Avg Min Dew Point   49.8   52.3   50.2   -0.4   55.6   in 2005   39.9   in 1988  
Month Average Dew Point   54.2   57.0   55.1   -0.9   60.2   in 2008   44.2   in 1988  
Precipitation   .12   T   .12   +.00   2.18   in 1905            
One Hour Rain   .12   T           .63   in 2001            
Hourly Rain Rate   1.35   .00           2.32   in 2011            
Month Precipitation   .37   1.34   1.41   -1.04   6.84   in 1982   T   in 1949  
Year Precipitation   21.04   20.54   20.45   +.59   36.73   in 1983   12.64   in 1957  
Snow                                      
Snow Depth                                      
Month Snow                                      
Season Snow   9.1   34.7   33.5   -24.4   84.1   in 1996   5.0   in 1998  
    June 12, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   97%   91%   +8%   100%   in 2003   60%   in 1951  
Minimum Humidity   77%   70%   58%   +19%   93%   in 1986   28%   in 1989  
Average Humidity   88%   84%   74%   +14%   97%   in 1986   46%   in 1989  
Maximum Barometer   29.90   30.04   30.02   -00.12   30.37   in 1999   29.47   in 1963  
Minimum Barometer   29.71   29.95   29.81   -00.10   30.26   in 1999   29.17   in 1985  
Average Barometer   29.81   30.00   29.92   -00.11   30.32   in 1999   29.43   in 1963  
Average Wind   7.4   5.5   6.2   +1.2   11.8   in 1979   2.3   in 1996  
Direction   SSE   SSW   SSW       WNW SSW
High Wind Gust   21   20   22   -1   50   in 1903   12   in 2003  
Direction   SSE   SSW   SSW       SE SSW
Maximum Water Temp   63.1   65.3   62.8   +0.3   68.0   in 2007   58.3   in 2003  
Minimum Water Temp   61.2   63.1   59.5   +1.8   65.1   in 2007   53.6   in 2006  
Average Water Temp   62.2   64.2   61.1   +1.0   66.6   in 2007   56.6   in 2020  
Sunrise/ AM Twilight   5:10:32 AM   4:36:56 AM            
Sunset / PM Twilight   8:19:29 PM   8:53:46 PM            
Length Of Day   15:08:57                          
Special Conditions   Fog                                  
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