Portsmouth Rhode Island Weather Almanac  
Sunday, September 22, 2024  
Cloudy early then Mostly Cloudy, Continued Windy, Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    September 22, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   67   71   70   -3   88   in 1980   54   in 1904  
Minimum Temperature   56   54   56   +0   70   in 1989   36   in 1904  
Average Temperature   62   63   63   -1   78   in 1980   45   in 1904  
 Month Avg Max Temperature   74.2   78.2   73.3   +0.9   80.7   in 1983   68.5   in 1963  
Month Avg Min Temperature   57.5   62.9   58.5   -1.0   63.4   in 1961   52.7   in 1984  
Month Average Temperature   66.1   70.8   65.9   +0.2   71.6   in 1961   61.5   in 1963  
High Heat Index   67   71   71   -4   89   in 1980            
Low Wind Chill                             31   in 1904  
Heating Degree Days   3   2   3   +0   20   in 1904   0   in 2022  
Month Heating DD   18   8   38   -20   106   in 1956   2   in 2021  
Season Heating DD   20   8   45   -25   137   in 1956   2   in 2021    
Cooling Degree Days   0   0   1   -1   13   in 1980   0   in 2024    
Month Cooling DD   42   136   58   -16   160   in 1961   7   in 1893    
Year Cooling DD   688   708   595   +93   840   in 2020   282   in 1902    
Maximum Dew Point   61   61   61   +0   71   in 2011   41   in 2020    
Minimum Dew Point   53   50   51   +2   68   in 1989   32   in 2020    
Average  Dew Point   57   56   56   +1   70   in 1989   37   in 2020  
 Month Avg Max Dew Point   63.8   68.9   63.6   +0.2   68.9   in 2023   54.8   in 1984  
Month Avg Min Dew Point   54.0   60.5   54.0   -0.0   60.5   in 2023   44.0   in 1984  
Month Average Dew Point   59.2   64.9   58.8   +0.4   64.9   in 2023   49.4   in 1984  
Precipitation   .00   .00   .13   -.13   1.86   in 1979            
One Hour Rain   .00   .00           .58   in 1990            
Half Hour Rain   .00   .00           .36   in 2013            
Hourly Rain Rate   .00   .00           3.13   in 2011            
Month Precipitation   1.69   3.85   2.71   -1.02   9.58   in 1960   .13   in 1946  
Year Precipitation   42.38   39.47   32.12   +10.26   48.02   in 1998   17.53   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 22, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   97%   98%   95%   +2%   100%   in 2017   78%   in 1955  
Minimum Humidity   68%   56%   62%   +6%   91%   in 2011   30%   in 2020  
Average Humidity   83%   77%   78%   +4%   95%   in 2011   56%   in 1955  
Maximum Barometer   30.06   30.41   30.11   -00.05   30.53   in 1929   29.73   in 1954  
Minimum Barometer   29.94   30.30   29.88   +00.06   30.30   in 2023   29.17   in 1966  
Average Barometer   30.00   30.36   30.00   +00.00   30.36   in 2023   29.51   in 1966  
Average Wind   12.1   5.3   6.7   +5.4   20.0   in 2017   2.0   in 2016  
Direction   N   ENE   SSW       NNE         N        
High Wind Gust   30   16   22   +8   43   in 2017   11   in 2016  
Direction   NNE   ENE   SW       NNE         SE        
Maximum Water Temp   65.7   67.8   67.9   -2.2   71.2   in 2021   64.6   in 2020  
Minimum Water Temp   64.8   65.8   66.0   -1.2   70.3   in 2021   63.1   in 2020  
Average Water Temp   65.3   66.8   67.0   -1.7   70.8   in 2021   63.9   in 2020  
Sunrise/ AM Twilight   6:33:02 AM   6:05:35 AM            
Sunset / PM Twilight   6:41:19 PM   7:10:02 PM            
Length Of Day   12:08:17                          
Special Conditions   None                                  
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