Portsmouth Rhode Island Weather Almanac  
Monday, August 12, 2024  
Clear early then Partly Cloudy, Early Evening Moderate Rain and Thunderstorm, Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    August 12, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   79   81   79   +0   92   in 1944   63   in 1979  
Minimum Temperature   61   61   64   -3   74   in 2020   51   in 1968  
Average Temperature   70   71   72   -2   82   in 2020   60   in 1979  
 Month Avg Max Temperature   81.0   79.5   79.4   +1.6   85.5   in 2020   71.5   in 1903  
Month Avg Min Temperature   66.6   63.7   64.8   +1.8   71.9   in 1988   56.3   in 1964  
Month Average Temperature   74.1   71.8   72.0   +2.1   78.6   in 1988   64.8   in 1964  
High Heat Index   80   86   81   -1   102   in 2020            
Low Wind Chill                             48   in 1968  
Heating Degree Days   0   0   0   +0   5   in 1979   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   5   6   7   -2   17   in 2020   0   in 1983    
Month Cooling DD   110   82   91   +19   163   in 1988   11   in 1964    
Year Cooling DD   552   466   419   +133   616   in 2020   203   in 1902    
Maximum Dew Point   66   74   69   -3   78   in 2020   50   in 1968    
Minimum Dew Point   57   57   60   -3   71   in 2020   44   in 2006    
Average  Dew Point   62   66   64   -2   75   in 2020   47   in 1968  
 Month Avg Max Dew Point   73.3   68.3   69.0   +4.3   75.0   in 2022   58.9   in 1964  
Month Avg Min Dew Point   64.1   58.8   61.1   +3.0   69.4   in 2003   48.4   in 1964  
Month Average Dew Point   68.7   63.5   64.9   +3.8   71.4   in 2003   53.7   in 1964  
Precipitation   .26   .06   .12   +.14   2.30   in 1983            
One Hour Rain   .16   .06           .92   in 1983            
Half Hour Rain   .13   .04           .13   in 2024            
Hourly Rain Rate   1.50   .19           1.50   in 2024            
Month Precipitation   1.00   2.72   1.43   -.43   6.82   in 1952   .00   in 1911  
Year Precipitation   39.27   32.97   27.21   +12.06   43.87   in 1983   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 12, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   95%   96%   94%   +1%   100%   in 2018   63%   in 1950  
Minimum Humidity   56%   56%   61%   -5%   92%   in 1955   33%   in 1974  
Average Humidity   76%   76%   78%   -2%   96%   in 1955   52%   in 1950  
Maximum Barometer   29.97   29.94   30.05   -00.08   30.34   in 1986   29.77   in 2008  
Minimum Barometer   29.89   29.87   29.86   +00.03   30.17   in 1994   29.53   in 1964  
Average Barometer   29.93   29.91   29.96   -00.03   30.23   in 1994   29.68   in 1964  
Average Wind   6.0   4.9   5.6   +0.4   12.5   in 1979   1.8   in 1994  
Direction   WNW   SSE   SSW       NNE         SSE        
High Wind Gust   22   16   20   +2   34   in 1983   9   in 1951  
Direction   WNW   SSW   WSW       NNE         SE        
Maximum Water Temp   74.3   74.1   72.3   +2.0   77.0   in 2003   68.3   in 2017  
Minimum Water Temp   72.3   71.8   69.0   +3.3   73.8   in 2012   63.6   in 2004  
Average Water Temp   73.3   73.0   70.7   +2.6   75.0   in 2012   66.9   in 2017  
Sunrise/ AM Twilight   5:51:17 AM   4:50:09 AM            
Sunset / PM Twilight   7:47:59 PM   8:51:57 PM            
Length Of Day   13:56:42                          
Special Conditions   Tlhunderstorm  
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