Portsmouth Rhode Island Weather Almanac  
Thursday, September 26, 2024  
Cloudy, Heavy Rain & Fog Late, Continued Warm  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    September 26, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   68   59   69   -1   86   in 1920   55   in 2000  
Minimum Temperature   59   48   55   +4   69   in 2018   41   in 1956  
Average Temperature   64   57   62   +2   76   in 1930   50   in 1956  
 Month Avg Max Temperature   73.1   75.5   72.7   +0.3   78.8   in 1961   67.3   in 1963  
Month Avg Min Temperature   57.2   61.7   58.0   -0.8   63.6   in 1961   52.1   in 1962  
Month Average Temperature   65.3   69.0   65.3   +0.0   71.3   in 1961   60.2   in 1963  
High Heat Index   70   59   70   +0   91   in 1958            
Low Wind Chill                             37   in 1956  
Heating Degree Days   1   8   4   -3   15   in 1956   0   in 2022  
Month Heating DD   33   33   53   -20   143   in 1956   2   in 2021  
Season Heating DD   35   33   60   -25   174   in 1956   2   in 2021    
Cooling Degree Days   0   0   1   -1   11   in 1930   0   in 2024    
Month Cooling DD   42   136   62   -20   180   in 1961   7   in 1893    
Year Cooling DD   688   708   599   +89   850   in 2020   283   in 1902    
Maximum Dew Point   67   57   61   +6   74   in 2018   40   in 1966    
Minimum Dew Point   57   47   50   +7   69   in 2018   14   in 1957    
Average  Dew Point   62   52   55   +7   72   in 2018   31   in 1957  
 Month Avg Max Dew Point   63.2   67.5   63.2   +0.0   67.7   in 2018   55.2   in 1966  
Month Avg Min Dew Point   53.9   59.4   53.5   +0.4   59.4   in 2023   44.9   in 1967  
Month Average Dew Point   58.8   63.7   58.3   +0.5   63.7   in 2023   50.3   in 1967  
Precipitation   .81   .04   .14   +.67   2.53   in 2008            
One Hour Rain   .57   .03           .98   in 1992            
Half Hour Rain   .32   .02           .32   in 2024            
Hourly Rain Rate   2.58   .02           6.70   in 2022            
Month Precipitation   2.50   5.31   3.24   -.74   10.67   in 1961   .31   in 1959  
Year Precipitation   43.19   40.93   32.65   +10.54   48.03   in 1998   17.64   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 26, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   99%   97%   94%   +5%   100%   in 2018   74%   in 1987  
Minimum Humidity   90%   81%   60%   +30%   93%   in 1975   24%   in 1957  
Average Humidity   95%   89%   77%   +17%   96%   in 1975   53%   in 1951  
Maximum Barometer   30.18   30.37   30.15   +00.03   30.57   in 1925   29.79   in 2022  
Minimum Barometer   30.00   30.25   29.91   +00.09   30.35   in 2015   29.30   in 1991  
Average Barometer   30.09   30.31   30.03   +00.06   30.42   in 2015   29.57   in 1991  
Average Wind   7.1   11.3   5.9   +1.2   13.4   in 2000   2.1   in 2011  
Direction   ESE   NE   SSW       NE         SW        
High Wind Gust   25   23   21   +4   38   in 1984   10   in 1971  
Direction   S   NE   S       WNW         SW        
Maximum Water Temp   65.3   65.3   66.9   -1.6   71.2   in 2021   63.7   in 1996  
Minimum Water Temp   64.8   63.9   65.1   -0.3   70.2   in 2021   61.7   in 2000  
Average Water Temp   65.1   64.6   66.0   -0.9   70.7   in 2021   62.9   in 1996  
Sunrise/ AM Twilight   6:37:10 AM   6:09:45 AM            
Sunset / PM Twilight   6:34:25 PM   7:03:06 PM            
Length Of Day   11:57:15                          
Special Conditions   Fog                                  
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