Portsmouth Rhode Island Weather Almanac  
Sunday, August 20, 2023  
Clear and Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    August 20, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   81   87   78   +3   93   in 1983   68   in 1893  
Minimum Temperature   62   66   63   -1   72   in 1899   50   in 1907  
Average Temperature   72   77   71   +1   81   in 1937   62   in 1998  
 Month Avg Max Temperature   78.6   83.4   79.1   -0.5   84.3   in 1937   72.5   in 1964  
Month Avg Min Temperature   64.2   66.9   64.4   -0.2   69.9   in 2018   55.8   in 1964  
Month Average Temperature   71.7   75.4   71.7   -0.0   76.9   in 1988   64.5   in 1964  
High Heat Index   83   93   79   +4   101   in 1983            
Low Wind Chill                             49   in 1907  
Heating Degree Days   0   0   0   +0   3   in 1998   0   in 2023  
Month Heating DD   0   0   0   +0   26   in 1964   0   in 2023  
Season Heating DD   0   0   0   +0   26   in 1964   0   in 2023  
Cooling Degree Days   7   12   5   +2   16   in 1937   0   in 2008  
Month Cooling DD   133   208   145   -12   237   in 1988   15   in 1964  
Year Cooling DD   517   596   473   +44   674   in 2020   210   in 1902  
Maximum Dew Point   67   72   68   -1   77   in 2009   51   in 1975  
Minimum Dew Point   56   63   59   -3   70   in 2015   44   in 1981  
Average  Dew Point   62   68   63   -1   73   in 2009   48   in 1981  
 Month Avg Max Dew Point   69.0   70.8   68.6   +0.4   73.5   in 2018   58.0   in 1964  
Month Avg Min Dew Point   59.7   63.1   60.5   -0.8   67.2   in 2018   47.4   in 1964  
Month Average Dew Point   64.3   66.9   64.5   -0.2   70.4   in 2018   52.7   in 1964  
Precipitation   .00   .00   .12   -.12   1.14   in 1939            
One Hour Rain   .00   .00           .44   in 2001            
Half Hour Rain   .00   .00           .24   in 2006            
Hourly Rain Rate   .00   .00           1.77   in 2006            
Month Precipitation   4.15   .62   2.39   +1.76   9.62   in 1946   .16   in 1993  
Year Precipitation   34.40   24.03   28.04   +6.36   43.94   in 1983   15.70   in 1957  
Snow                                      
Snow Depth                                      
Month Snow                                      
Season Snow   0.0   0.0   0.0   +0.0   0.0   in 1996   0.0   in 1998  
    August 20, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   91%   98%   93%   -2%   100%   in 2014   73%   in 1953  
Minimum Humidity   57%   55%   57%   +0%   90%   in 1950   33%   in 1987  
Average Humidity   74%   77%   75%   -1%   94%   in 1950   57%   in 1975  
Maximum Barometer   30.08   30.18   30.06   +00.02   30.49   in 1996   29.77   in 1950  
Minimum Barometer   30.00   30.11   29.87   +00.13   30.29   in 1996   29.49   in 1983  
Average Barometer   30.04   30.15   29.97   +00.07   30.39   in 1996   29.67   in 1983  
Average Wind   5.5   4.8   5.6   -0.1   10.8   in 1950   1.6   in 2012  
Direction   W   SW   SW       SSW SSW
High Wind Gust   21   19   20   +1   41   in 1904   10   in 1973  
Direction   SSW   SSW   SSW       SE E
Maximum Water Temp   71.8   75.4   71.6   +0.2   76.5   in 2003   65.7   in 2020  
Minimum Water Temp   70.2   72.7   68.9   +1.3   72.9   in 2018   63.9   in 2008  
Average Water Temp   71.0   74.1   70.2   +0.8   74.3   in 2003   65.0   in 2020  
Sunrise/ AM Twilight   5:58:41 AM   4:57:34 AM            
Sunset / PM Twilight   7:37:31 PM   8:45:49 PM            
Length Of Day   13:38:50                          
Special Conditions   None                              
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