Portsmouth Rhode Island Weather Almanac  
Wednesday, August 21, 2024  
Clear, Low Humidty, Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    August 21, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   73   85   78   -5   92   in 1955   64   in 1956  
Minimum Temperature   55   67   63   -8   74   in 2009   50   in 1913  
Average Temperature   64   76   71   -7   82   in 1955   60   in 1956  
 Month Avg Max Temperature   79.6   78.9   79.0   +0.6   84.6   in 1937   72.6   in 1964  
Month Avg Min Temperature   64.5   64.3   64.3   +0.2   69.5   in 2018   55.9   in 1964  
Month Average Temperature   72.3   71.9   71.7   +0.6   76.9   in 1937   64.6   in 1964  
High Heat Index   73   93   79   -6   100   in 1955            
Low Wind Chill                             49   in 1913  
Heating Degree Days   1   0   0   +1   5   in 1956   0   in 2023  
Month Heating DD   2   0   0   +2   26   in 1964   0   in 2023  
Season Heating DD   2   0   3   -1   34   in 1914   0   in 2023    
Cooling Degree Days   0   11   6   -6   17   in 1955   0   in 2024    
Month Cooling DD   155   144   151   +4   250   in 1937   17   in 1964    
Year Cooling DD   597   528   479   +118   681   in 2020   210   in 1902    
Maximum Dew Point   61   75   68   -7   77   in 2009   46   in 1969    
Minimum Dew Point   51   64   59   -8   73   in 2009   38   in 1982    
Average  Dew Point   56   70   63   -7   75   in 2009   43   in 1969  
 Month Avg Max Dew Point   71.7   69.2   68.6   +3.1   73.1   in 2018   57.9   in 1964  
Month Avg Min Dew Point   62.3   59.9   60.4   +1.9   66.9   in 2018   47.4   in 1964  
Month Average Dew Point   67.0   64.5   64.4   +2.5   70.0   in 2018   52.6   in 1964  
Precipitation   .00   .00   .12   -.12   1.97   in 1997            
One Hour Rain   .00   .00           .88   in 1994            
Half Hour Rain   .00   .00           .27   in 2004            
Hourly Rain Rate   .00   .00           2.17   in 2004            
Month Precipitation   2.22   4.15   2.51   -.29   9.62   in 1946   .16   in 1993  
Year Precipitation   40.49   34.40   28.29   +12.20   43.94   in 1983   15.70   in 1957  
Snow   0.0   0.0   0.0   +0.0   0.0   in 1900            
Snow Depth   0   0   0   +0   0   in              
Month Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in Many  
Season Snow                                      
    August 21, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   93%   98%   92%   +1%   100%   in 2004   58%   in 1983  
Minimum Humidity   63%   68%   59%   +4%   95%   in 1961   29%   in 1987  
Average Humidity   78%   83%   76%   +2%   98%   in 1961   48%   in 1983  
Maximum Barometer   30.05   30.05   30.08   -00.03   30.40   in 1926   29.82   in 1955  
Minimum Barometer   29.93   29.96   29.88   +00.05   30.21   in 2000   29.54   in 1988  
Average Barometer   29.99   30.01   29.98   +00.01   30.27   in 1974   29.72   in 1971  
Average Wind   5.9   3.4   5.6   +0.3   14.0   in 1980   1.6   in 1965  
Direction   WNW   WNW   SSW       NE         SE        
High Wind Gust   20   13   20   +0   46   in 1997   10   in 1998  
Direction   SSW   WNW   SSW       ESE         W        
Maximum Water Temp   70.2   72.0   71.4   -1.2   78.1   in 2003   66.4   in 2020  
Minimum Water Temp   68.5   69.3   68.7   -0.2   73.2   in 2022   64.1   in 2008  
Average Water Temp   69.4   70.7   70.1   -0.7   74.1   in 2022   65.3   in 2020  
Sunrise/ AM Twilight   6:00:29 AM   4:58:34 AM            
Sunset / PM Twilight   7:34:51 PM   8:44:54 PM            
Length Of Day   13:34:22                          
Special Conditions   None                                  
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