Portsmouth Rhode Island Weather Almanac  
Wednesday, September 25, 2024  
Cloudy early then Mostly Cloudy, Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    September 25, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   68   61   69   -1   86   in 1920   57   in 1977  
Minimum Temperature   56   57   55   +1   67   in 2011   40   in 1963  
Average Temperature   62   59   62   +0   75   in 1926   50   in 1950  
 Month Avg Max Temperature   73.3   76.1   72.9   +0.4   79.1   in 1983   67.5   in 1963  
Month Avg Min Temperature   57.1   62.2   58.1   -1.0   63.4   in 1961   51.9   in 1962  
Month Average Temperature   65.4   69.4   65.5   -0.1   71.2   in 1961   60.2   in 1963  
High Heat Index   69   62   69   +0   87   in 1920            
Low Wind Chill                             37   in 1950  
Heating Degree Days   3   6   4   -1   15   in 1950   0   in 2021  
Month Heating DD   32   25   49   -17   132   in 1963   2   in 2021  
Season Heating DD   34   25   56   -22   159   in 1956   2   in 2021    
Cooling Degree Days   0   0   1   -1   10   in 1926   0   in 2024    
Month Cooling DD   42   136   61   -19   171   in 1961   7   in 1893    
Year Cooling DD   688   708   598   +90   848   in 2020   283   in 1902    
Maximum Dew Point   58   61   61   -3   71   in 2011   38   in 1950    
Minimum Dew Point   53   56   50   +3   66   in 2011   28   in 1950    
Average  Dew Point   56   59   56   +0   69   in 2011   33   in 1950  
 Month Avg Max Dew Point   63.1   68.0   63.3   -0.2   68.0   in 2023   55.8   in 1967  
Month Avg Min Dew Point   53.8   59.9   53.6   +0.2   59.9   in 2023   45.2   in 1967  
Month Average Dew Point   58.7   64.1   58.4   +0.3   64.1   in 2023   50.5   in 1967  
Precipitation   .00   .31   .13   -.13   2.44   in 1991            
One Hour Rain   .00   .12           .64   in 1961            
Half Hour Rain   .00   .10           .18   in 2018            
Hourly Rain Rate   .00   .78           2.97   in 2021            
Month Precipitation   1.69   5.27   3.10   -1.41   10.15   in 1961   .31   in 1959  
Year Precipitation   42.38   40.89   32.51   +9.87   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 25, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   94%   99%   92%   +2%   100%   in 2018   74%   in 1964  
Minimum Humidity   69%   93%   58%   +11%   93%   in 2023   29%   in 1963  
Average Humidity   82%   96%   75%   +6%   97%   in 2001   55%   in 1950  
Maximum Barometer   30.22   30.25   30.15   +00.07   30.57   in 2018   29.85   in 1969  
Minimum Barometer   30.14   29.99   29.94   +00.20   30.40   in 2008   29.43   in 1991  
Average Barometer   30.18   30.12   30.05   +00.13   30.45   in 2008   29.66   in 1991  
Average Wind   5.6   11.5   6.2   -0.6   13.4   in 1958   1.1   in 1994  
Direction   ESE   NE   SSW       SSW         S        
High Wind Gust   12   25   21   -9   44   in 1991   8   in 1994  
Direction   NE   NE   SW       SW         N        
Maximum Water Temp   65.5   65.5   66.8   -1.3   71.2   in 2021   64.0   in 1997  
Minimum Water Temp   64.2   64.8   65.1   -0.9   70.2   in 2021   61.7   in 1997  
Average Water Temp   64.9   65.2   66.0   -1.1   70.7   in 2021   62.9   in 1997  
Sunrise/ AM Twilight   6:36:08 AM   6:08:42 AM            
Sunset / PM Twilight   6:36:08 PM   7:04:49 PM            
Length Of Day   12:00:00                          
Special Conditions   None                                  
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