Portsmouth Rhode Island Weather Almanac  
Monday, August 23, 2021  
Dense Fog early, Mostly Cloudy Day to Cloudy & Heavy PM Rain, Thunder, Breezy, Remnants From TS Henri  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    August 23, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   81   87   78   +3   88   in 1960   63   in 1937  
Minimum Temperature   70   66   63   +7   73   in 2009   47   in 1957  
Average Temperature   76   77   71   +5   79   in 2009   59   in 1937  
 Month Avg Max Temperature   80.7   83.3   78.9   +1.8   83.7   in 1944   72.7   in 1964  
Month Avg Min Temperature   66.7   67.3   64.2   +2.5   69.0   in 2018   56.4   in 1964  
Month Average Temperature   74.0   75.5   71.6   +2.3   76.0   in 1939   64.9   in 1964  
High Heat Index   87   92   78   +9   92   in 2020            
Low Wind Chill                             #N/A   in #N/A  
HDD   0   0   0   +0   6   in 1937   0   in    
Month HDD   0   0   0   +0   26   in 1964   0   in 2021  
Season HDD   9   0   3   +6   34   in 1914   0   in 2020  
CDD   11   12   6   +5   14   in 2009   0   in 2010  
Month CDD   206   242   163   +43   253   in 1939   23   in 1964  
Year CDD   596   706   491   +105   706   in 2020   216   in 1902  
Maximum Dew Point   76   74   67   +9   76   in 2021   53   in 1988  
Minimum Dew Point   70   64   59   +11   70   in 2021   38   in 1987  
Average  Dew Point   73   69   63   +10   73   in 2021   46   in 1957  
 Month Avg Max Dew Point   71.8   71.2   68.4   +3.4   72.8   in 2018   58.9   in 1964  
Month Avg Min Dew Point   63.9   63.3   60.3   +3.6   66.1   in 2003   48.3   in 1964  
Month Average Dew Point   67.8   67.2   64.3   +3.5   69.4   in 2018   53.6   in 1964  
Precipitation   .82   .00   .12   +.70   1.42   in 1946            
One Hour   .35   .00           .51   in 1955            
Hourly Rate   7.02   .00           7.02   in 2021            
Month Precipitation   6.03   1.40   2.75   +3.28   11.04   in 1946   .16   in 1993  
Year Precipitation   28.86   23.78   28.40   +.46   43.94   in 1983   15.70   in 1957  
Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A            
Snow Depth   #N/A   #N/A           #N/A   in              
Month Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in    
Season Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in #N/A  
    August 23, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   100%   96%   92%   +8%   100%   in 2021   72%   in 1959  
Minimum Humidity   85%   59%   57%   +28%   89%   in 1966   29%   in 1957  
Average Humidity   93%   78%   75%   +18%   95%   in 1966   55%   in 1959  
Maximum Barometer   29.88   30.08   30.08   -00.20   30.54   in 1992   29.75   in 1971  
Minimum Barometer   29.75   29.98   29.89   -00.14   30.23   in 1954   29.47   in 1971  
Average Barometer   29.82   30.03   29.98   -00.17   30.35   in 1954   29.61   in 1971  
Average Wind   7.7   4.0   5.5   +2.2   13.1   in 2010   1.9   in 2006  
Direction   SSE   SSE   SSW       NE         W        
High Wind Gust   29   28   21   +8   48   in 1930   10   in 2007  
Direction   SW   SW   SW       NE         SSE        
Maximum Water Temp   73.4   66.9   71.3   +2.1   74.9   in 2003   66.9   in 2020  
Minimum Water Temp   71.8   63.0   67.0   +4.8   72.4   in 2018   31.8   in 2021  
Average Water Temp   72.6   65.0   69.9   +2.7   73.3   in 2015   65.0   in 2020  
Sunrise/ AM Twilight   6:03:26 AM   5:34:30 AM            
Sunset / PM Twilight   7:31:45 PM   8:00:41 PM            
Length Of Day   13:28:19                          
Special Conditions   Dense Fog, thunderstorm                      
Comments   Remnants of Tropical Storm Henri                  
Hour-by-Hour Weather For August 23, 2021            
Climate Weather for August 23            
Weather History For August 23            
Weather Calendar            
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