Portsmouth Rhode Island Weather Almanac  
Tuesday, September 3, 2024  
Clear, Dry and Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    September 3, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   73   84   76   -3   93   in 1929   65   in 1943  
Minimum Temperature   52   64   61   -9   72   in 1973   45   in 1893  
Average Temperature   63   74   68   -5   82   in 1929   57   in 1893  
 Month Avg Max Temperature   75.7   77.0   76.3   -0.7   90.3   in 1929   66.3   in 2003  
Month Avg Min Temperature   61.0   58.0   61.3   -0.3   72.3   in 1959   50.0   in 2017  
Month Average Temperature   68.7   67.7   68.7   +0.0   80.3   in 1898   59.0   in 2017  
High Heat Index   72   89   77   -5   101   in 1973            
Low Wind Chill                             42   in 1893  
Heating Degree Days   2   0   1   +1   8   in 1893   0   in 2024  
Month Heating DD   2   1   3   -1   18   in 2017   0   in 2022  
Season Heating DD   4   1   10   -6   42   in 1905   0   in 2022    
Cooling Degree Days   0   9   4   -4   17   in 1929   0   in 2024    
Month Cooling DD   13   9   14   -1   46   in 1898   0   in 2017    
Year Cooling DD   659   581   551   +108   783   in 2020   267   in 1902    
Maximum Dew Point   53   73   65   -12   76   in 2010   48   in 1960    
Minimum Dew Point   44   62   57   -13   72   in 1959   39   in 1967    
Average  Dew Point   49   68   61   -12   74   in 1959   45   in 1960  
 Month Avg Max Dew Point   65.0   64.7   65.7   -0.7   74.3   in 1959   51.7   in 1970  
Month Avg Min Dew Point   54.3   55.0   57.0   -2.7   71.7   in 1959   39.7   in 1991  
Month Average Dew Point   60.0   60.0   61.0   -1.0   73.0   in 1959   46.3   in 1970  
Precipitation   .00   .00   .11   -.11   2.87   in 1972            
One Hour Rain   .00   .00           .52   in 2010            
Half Hour Rain   .00   .00           .35   in 2010            
Hourly Rain Rate   .00   .00           5.24   in 2010            
Month Precipitation   .06   .00   .33   -.27   6.45   in 2021   .00   in 2022  
Year Precipitation   40.75   35.62   29.74   +11.01   45.30   in 1998   16.55   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                                      
    September 3, 2024     Record Record
Observed Daily Data   2024   2024   Norm   Depart   Highest Lowest
Maximum Humidity   83%   98%   93%   -10%   100%   in 2017   71%   in 1953  
Minimum Humidity   40%   62%   60%   -20%   95%   in 1986   33%   in 1960  
Average Humidity   62%   80%   76%   -15%   98%   in 1986   54%   in 1960  
Maximum Barometer   30.36   30.03   30.09   +00.27   30.48   in 1986   29.74   in 1957  
Minimum Barometer   30.15   29.84   29.89   +00.26   30.24   in 1994   29.32   in 2010  
Average Barometer   30.26   29.94   29.99   +00.27   30.30   in 1994   29.63   in 2010  
Average Wind   6.6   4.4   5.8   +0.8   17.9   in 1972   1.2   in 2009  
Direction   N   W   SW       NNE         SE        
High Wind Gust   23   19   20   +3   48   in 1972   10   in 1976  
Direction   N   SW   NNW       NNE         S        
Maximum Water Temp   69.4   70.2   70.5   -1.1   75.2   in 2010   65.8   in 2017  
Minimum Water Temp   66.9   68.5   68.2   -1.3   71.6   in 2022   64.1   in 2017  
Average Water Temp   68.2   69.4   69.4   -1.2   72.6   in 2022   65.0   in 2017  
Sunrise/ AM Twilight   6:13:43 AM   5:45:40 AM            
Sunset / PM Twilight   7:13:55 PM   7:43:15 PM            
Length Of Day   13:00:12                          
Special Conditions   None                                  
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