Portsmouth Rhode Island Weather Almanac  
Sunday, August 11, 2024  
Partly Cloudy to Clear PM, Light Winds, Less Humid and Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    August 11, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   80   82   79   +1   94   in 1944   65   in 1922  
Minimum Temperature   65   66   64   +1   74   in 1988   53   in 1972  
Average Temperature   73   74   72   +1   83   in 1900   62   in 1922  
 Month Avg Max Temperature   81.2   79.4   79.5   +1.7   85.1   in 2020   71.0   in 1903  
Month Avg Min Temperature   67.1   63.9   64.8   +2.3   71.8   in 1988   55.5   in 1964  
Month Average Temperature   74.5   71.9   72.0   +2.5   78.5   in 1988   64.4   in 1964  
High Heat Index   80   83   81   -1   107   in 1944            
Low Wind Chill                                      
Heating Degree Days   0   0   0   +0   3   in 1922   0   in 2024  
Month Heating DD   1   0   0   +1   18   in 1903   0   in 2023  
Season Heating DD   1   0   3   -2   34   in 1914   0   in 2023    
Cooling Degree Days   8   9   7   +1   18   in 1900   0   in 1994    
Month Cooling DD   105   76   84   +21   149   in 1988   7   in 1964    
Year Cooling DD   547   460   412   +135   599   in 2020   201   in 1902    
Maximum Dew Point   67   68   69   -2   77   in 2021   52   in 1974    
Minimum Dew Point   55   63   60   -5   73   in 1988   41   in 1968    
Average  Dew Point   61   66   65   -4   75   in 2016   50   in 1974  
 Month Avg Max Dew Point   74.0   67.7   69.0   +5.0   75.6   in 2022   58.0   in 1964  
Month Avg Min Dew Point   64.7   59.0   61.2   +3.5   69.3   in 2003   47.3   in 1964  
Month Average Dew Point   69.4   63.4   65.0   +4.4   72.0   in 2022   52.6   in 1964  
Precipitation   .00   .00   .12   -.12   2.14   in 1898            
One Hour Rain   .00   .00           .61   in 2015            
Half Hour Rain   .00   .00           .44   in 2015            
Hourly Rain Rate   .00   .00           3.24   in 2012            
Month Precipitation   .74   2.66   1.31   -.57   6.70   in 1952   .00   in 1911  
Year Precipitation   39.01   32.91   27.09   +11.92   41.98   in 1998   15.63   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 11, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   97%   98%   94%   +3%   100%   in 2017   81%   in 1967  
Minimum Humidity   43%   55%   62%   -19%   91%   in 1990   32%   in 2017  
Average Humidity   70%   77%   78%   -8%   96%   in 1990   60%   in 1974  
Maximum Barometer   30.01   29.88   30.03   -00.02   30.45   in 1940   29.66   in 1954  
Minimum Barometer   29.93   29.56   29.83   +00.10   30.13   in 1994   29.51   in 1992  
Average Barometer   29.97   29.72   29.93   +00.04   30.21   in 1989   29.62   in 1954  
Average Wind   4.0   6.4   5.5   -1.5   12.3   in 1971   2.4   in 2017  
Direction   SSW   NW   SSW       SW         SSE        
High Wind Gust   17   24   20   -3   35   in 1986   10   in 1951  
Direction   S   WNW   S       WSW         SE        
Maximum Water Temp   74.3   73.8   72.4   +1.9   76.3   in 2018   68.3   in 2006  
Minimum Water Temp   71.2   71.4   69.0   +2.2   74.8   in 2018   63.7   in 2001  
Average Water Temp   72.8   72.6   70.7   +2.0   75.6   in 2018   66.4   in 2006  
Sunrise/ AM Twilight   5:50:16 AM   4:49:18 AM            
Sunset / PM Twilight   7:49:21 PM   8:52:33 PM            
Length Of Day   13:59:05                          
Special Conditions   None                                  
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