Portsmouth Rhode Island Weather Almanac  
Saturday, August 31, 2024  
Partly Cloudy, Light Winds and Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    August 31, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   77   75   77   +0   93   in 1973   62   in 1903  
Minimum Temperature   60   58   62   -2   72   in 2005   41   in 1965  
Average Temperature   69   67   70   -1   82   in 1973   53   in 1965  
 Month Avg Max Temperature   79.5   78.0   78.6   +0.9   83.3   in 2022   73.0   in 1903  
Month Avg Min Temperature   63.1   63.6   63.7   -0.6   68.0   in 2018   57.6   in 1964  
Month Average Temperature   71.5   71.1   71.2   +0.3   75.4   in 2022   66.1   in 1964  
High Heat Index   80   74   79   +1   104   in 1973            
Low Wind Chill                             37   in 1965  
Heating Degree Days   0   0   1   -1   12   in 1965   0   in 2024  
Month Heating DD   2   0   4   -2   38   in 1905   0   in 2023  
Season Heating DD   2   0   7   -5   40   in 1914   0   in 2023    
Cooling Degree Days   4   2   5   -1   17   in 1973   0   in 2009    
Month Cooling DD   204   188   209   -5   323   in 2022   61   in 1964    
Year Cooling DD   646   572   537   +109   766   in 2020   253   in 1902    
Maximum Dew Point   71   61   66   +5   75   in 2022   49   in 1965    
Minimum Dew Point   58   49   57   +1   72   in 2005   33   in 1965    
Average  Dew Point   65   55   61   +4   73   in 2005   41   in 1965  
 Month Avg Max Dew Point   70.6   68.9   67.9   +2.7   72.5   in 2021   60.8   in 1964  
Month Avg Min Dew Point   60.6   59.4   59.6   +1.0   65.0   in 2018   50.8   in 1964  
Month Average Dew Point   65.6   64.2   63.7   +1.9   68.6   in 2018   55.8   in 1964  
Precipitation   .00   .00   .11   -.11   2.60   in 1954            
One Hour Rain   .00   .00           .83   in 2022            
Half Hour Rain   .00   .00           .66   in 2022            
Hourly Rain Rate   .00   .00           10.67   in 2022            
Month Precipitation   2.42   5.37   3.63   -1.21   11.81   in 1985   .33   in 1993  
Year Precipitation   40.69   35.62   29.41   +11.28   45.30   in 1998   16.54   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 31, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   99%   87%   93%   +6%   100%   in 2004   62%   in 1953  
Minimum Humidity   80%   48%   58%   +22%   90%   in 1950   31%   in 1968  
Average Humidity   90%   68%   76%   +14%   95%   in 1950   50%   in 1953  
Maximum Barometer   30.23   30.11   30.10   +00.13   30.54   in 2002   29.78   in 2021  
Minimum Barometer   29.98   29.91   29.89   +00.09   30.29   in 2002   28.65   in 1954  
Average Barometer   30.11   30.01   29.99   +00.11   30.42   in 2002   29.26   in 1954  
Average Wind   4.3   9.8   6.1   -1.8   27.5   in 1954   1.3   in 1990  
Direction   ESE   N   SSW       SW         SW        
High Wind Gust   16   24   22   -6   109   in 1954   11   in 1950  
Direction   #N/A   #N/A   SSW       ESE         SE        
Maximum Water Temp   71.1   69.3   71.0   +0.1   76.3   in 2021   66.9   in 2003  
Minimum Water Temp   68.4   68.4   68.7   -0.3   73.9   in 2021   63.5   in 2020  
Average Water Temp   69.8   68.9   69.8   -0.1   75.1   in 2021   65.6   in 2003  
Sunrise/ AM Twilight   6:10:41 AM   5:09:04 AM            
Sunset / PM Twilight   7:18:54 PM   8:34:07 PM            
Length Of Day   13:08:13                          
Special Conditions   Fog                                  
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