Portsmouth Rhode Island Weather Almanac  
Tuesday, August 15, 2023  
Cloudy, Moderate Rain  & Fog early, Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    August 15, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   73   81   79   -6   91   in 1928   65   in 1905  
Minimum Temperature   67   60   64   +3   74   in 2016   53   in 1964  
Average Temperature   70   71   71   -1   81   in 2016   61   in 1992  
 Month Avg Max Temperature   79.3   83.5   79.3   -0.1   84.7   in 2020   72.3   in 1964  
Month Avg Min Temperature   64.3   68.1   64.6   -0.3   72.3   in 1988   55.6   in 1964  
Month Average Temperature   72.1   76.1   71.9   +0.1   78.9   in 1988   64.3   in 1964  
High Heat Index   74   82   80   -6   98   in 1928            
Low Wind Chill                                 in #N/A  
Heating Degree Days   0   0   0   +0   4   in 1992   0   in 2023  
Month Heating DD   0   0   0   +0   21   in 1964   0   in 2023  
Season Heating DD   0   0   0   +0   21   in 1964   0   in 2023  
Cooling Degree Days   5   6   7   -2   16   in 2016   0   in 1992  
Month Cooling DD   106   167   112   -6   208   in 1988   11   in 1964  
Year Cooling DD   490   555   440   +50   646   in 2020   208   in 1902  
Maximum Dew Point   70   62   68   +2   76   in 1959   46   in 1964  
Minimum Dew Point   64   56   60   +4   70   in 1989   40   in 1968  
Average  Dew Point   67   59   64   +3   72   in 1989   43   in 1964  
 Month Avg Max Dew Point   69.0   72.1   68.8   +0.2   74.2   in 2018   57.4   in 1964  
Month Avg Min Dew Point   59.9   64.7   60.9   -1.0   68.3   in 2003   46.7   in 1964  
Month Average Dew Point   64.4   68.4   64.7   -0.3   71.0   in 2018   52.1   in 1964  
Precipitation   .39   .00   .12   +.27   2.69   in 1973            
One Hour Rain   .19   .00           1.17   in 2012            
Half Hour Rain   .11   .00           1.17   in 2012            
Hourly Rain Rate   .62   .00           9.60   in 2012            
Month Precipitation   3.51   .42   1.79   +1.72   7.15   in 1946   .07   in 1940  
Year Precipitation   33.76   23.83   27.44   +6.32   43.87   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 15, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   94%   92%   +7%   100%   in 2005   56%   in 1968  
Minimum Humidity   86%   51%   61%   +25%   92%   in 1973   33%   in 1968  
Average Humidity   93%   73%   76%   +16%   96%   in 1973   45%   in 1968  
Maximum Barometer   29.92   30.04   30.07   -00.15   30.40   in 1946   29.80   in 1953  
Minimum Barometer   29.74   29.99   29.88   -00.14   30.17   in 2002   29.48   in 1988  
Average Barometer   29.83   30.02   29.98   -00.15   30.21   in 2004   29.67   in 1953  
Average Wind   5.9   2.9   6.0   -0.1   12.4   in 1988   2.1   in 1989  
Direction   ENE   SSE   SSW       WSW SW
High Wind Gust   22   17   21   +1   38   in 1961   11   in 2017  
Direction   SSE   S   SW       S SSE
Maximum Water Temp   72.3   73.0   71.9   +0.4   76.0   in 2003   68.0   in 2020  
Minimum Water Temp   68.9   71.2   68.8   +0.1   73.9   in 2018   64.8   in 2004  
Average Water Temp   70.6   72.1   70.3   +0.3   74.8   in 2018   66.5   in 2004  
Sunrise/ AM Twilight   5:53:34 AM   4:52:48 AM            
Sunset / PM Twilight   7:44:50 PM   8:49:54 PM            
Length Of Day   13:51:16                          
Special Conditions   Fog                                  
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