Portsmouth Rhode Island Weather Almanac  
Thursday, August 10, 2023  
Clear early, P Cloudy Day to Cloudy, Very Light Rain PM, Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    August 10, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   81   81   79   +2   92   in 1949   63   in 1962  
Minimum Temperature   64   67   64   +0   75   in 1988   49   in 1964  
Average Temperature   73   74   72   +1   83   in 1896   60   in 2007  
 Month Avg Max Temperature   79.1   85.0   79.5   -0.4   86.0   in 1980   71.0   in 1903  
Month Avg Min Temperature   63.7   70.8   64.9   -1.2   71.6   in 1988   55.2   in 1964  
Month Average Temperature   71.7   78.2   72.0   -0.3   78.3   in 1988   64.2   in 1964  
High Heat Index   82   84   82   +0   104   in 1949            
Low Wind Chill                             49   in 1964  
Heating Degree Days   0   0   0   +0   5   in 2007   0   in 2023  
Month Heating DD   0   0   0   +0   18   in 1903   0   in 2023  
Season Heating DD   0   0   0   +0   18   in 1903   0   in 2023  
Cooling Degree Days   8   9   7   +1   18   in 1896   0   in 2007  
Month Cooling DD   67   132   77   -10   133   in 1988   6   in 1964  
Year Cooling DD   451   520   405   +46   584   in 2020   193   in 1902  
Maximum Dew Point   72   76   69   +3   76   in 2022   54   in 1964  
Minimum Dew Point   60   66   61   -1   72   in 2012   39   in 1964  
Average  Dew Point   66   71   65   +1   74   in 2012   47   in 1964  
 Month Avg Max Dew Point   67.7   76.0   69.0   -1.3   76.0   in 2022   57.4   in 1964  
Month Avg Min Dew Point   58.6   68.6   61.3   -2.7   69.3   in 2003   46.7   in 1964  
Month Average Dew Point   63.2   72.3   65.0   -1.9   72.3   in 2022   52.1   in 1964  
Precipitation   .01   .00   .12   -.11   2.97   in 1991            
One Hour Rain   .01   .00           1.34   in 1954            
Half Hour Rain   .01   .00           .74   in 2012            
Hourly Rain Rate   .00   .00           9.76   in 2012            
Month Precipitation   2.66   .33   1.19   +1.47   6.70   in 1952   .00   in 1998  
Year Precipitation   32.91   23.74   26.84   +6.07   41.55   in 1998   15.63   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 10, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   96%   99%   93%   +3%   100%   in 2017   67%   in 1972  
Minimum Humidity   58%   72%   62%   -4%   88%   in 1954   35%   in 1999  
Average Humidity   77%   86%   77%   -0%   93%   in 1954   55%   in 1983  
Maximum Barometer   29.76   30.06   30.01   -00.25   30.38   in 1989   29.67   in 2011  
Minimum Barometer   29.58   29.94   29.82   -00.24   30.19   in 1993   29.30   in 1959  
Average Barometer   29.67   30.00   29.92   -00.25   30.26   in 1993   29.55   in 1959  
Average Wind   5.7   5.8   5.9   -0.2   18.3   in 1976   2.1   in 1989  
Direction   SSW   NNE   SSW       SSE SW
High Wind Gust   21   20   21   -0   52   in 1976   11   in 1984  
Direction   S   N   SSW       SSE S
Maximum Water Temp   72.7   74.8   72.5   +0.2   75.8   in 2018   69.4   in 2017  
Minimum Water Temp   70.9   70.2   69.4   +1.5   74.6   in 2012   65.9   in 2017  
Average Water Temp   71.8   72.5   71.0   +0.8   75.1   in 2012   67.7   in 2017  
Sunrise/ AM Twilight   5:48:28 AM   4:48:28 AM            
Sunset / PM Twilight   7:51:43 PM   8:53:07 PM            
Length Of Day   14:03:15                          
Special Conditions   None                              
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