Portsmouth Rhode Island Weather Almanac  
Monday, September 23, 2024  
Partly Cloudy early then Mostly Cloudy, Breezy and Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    September 23, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   65   60   70   -5   86   in 1980   54   in 1963  
Minimum Temperature   53   55   55   -2   69   in 2021   35   in 1904  
Average Temperature   59   58   63   -4   75   in 1980   47   in 1904  
 Month Avg Max Temperature   73.8   77.4   73.2   +0.7   80.1   in 1983   67.9   in 1963  
Month Avg Min Temperature   57.3   62.6   58.4   -1.0   63.4   in 1961   52.3   in 1962  
Month Average Temperature   65.8   70.3   65.8   +0.0   71.6   in 1961   61.0   in 1963  
High Heat Index   64   61   70   -6   87   in 1959            
Low Wind Chill                             29   in 1904  
Heating Degree Days   6   7   3   +3   18   in 1904   0   in 2021  
Month Heating DD   24   15   41   -17   110   in 1956   2   in 2021  
Season Heating DD   26   15   48   -22   141   in 1956   2   in 2021    
Cooling Degree Days   0   0   1   -1   10   in 1980   0   in 2024    
Month Cooling DD   42   136   59   -17   166   in 1961   7   in 1893    
Year Cooling DD   688   708   596   +92   841   in 2020   283   in 1902    
Maximum Dew Point   57   60   61   -4   73   in 1989   43   in 1963    
Minimum Dew Point   52   52   51   +1   67   in 2021   30   in 1963    
Average  Dew Point   55   56   56   -1   70   in 2021   37   in 1963  
 Month Avg Max Dew Point   63.5   68.5   63.5   +0.0   68.5   in 2023   55.1   in 1984  
Month Avg Min Dew Point   53.9   60.1   53.9   +0.0   60.1   in 2023   44.1   in 1984  
Month Average Dew Point   59.0   64.5   58.7   +0.3   64.5   in 2023   49.6   in 1984  
Precipitation   .00   .75   .13   -.13   2.25   in 1919            
One Hour Rain   .00   .16           1.40   in 2002            
Half Hour Rain   .00   .11           .18   in 2011            
Hourly Rain Rate   .00   .46           4.50   in 2011            
Month Precipitation   1.69   4.60   2.84   -1.15   9.58   in 1960   .13   in 1946  
Year Precipitation   42.38   40.22   32.25   +10.13   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 23, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   98%   99%   93%   +5%   100%   in 2017   60%   in 1983  
Minimum Humidity   68%   87%   60%   +8%   96%   in 2011   38%   in 1955  
Average Humidity   83%   93%   76%   +7%   98%   in 1994   50%   in 1983  
Maximum Barometer   30.09   30.33   30.11   -00.02   30.61   in 1904   29.57   in 1950  
Minimum Barometer   30.03   30.12   29.87   +00.16   30.42   in 2008   29.19   in 1966  
Average Barometer   30.06   30.23   29.99   +00.07   30.46   in 2008   29.42   in 1966  
Average Wind   8.4   11.2   6.9   +1.5   16.5   in 2022   2.0   in 1960  
Direction   NE   NE   N       NNW         S        
High Wind Gust   21   23   23   -2   45   in 1989   11   in 2018  
Direction   ENE   NE   SSW       SW         NE        
Maximum Water Temp   65.5   66.2   67.6   -2.1   71.8   in 2021   64.3   in 2013  
Minimum Water Temp   64.8   65.3   65.5   -0.7   70.3   in 2021   61.9   in 2020  
Average Water Temp   65.2   65.8   66.5   -1.4   71.1   in 2021   63.6   in 2020  
Sunrise/ AM Twilight   6:34:04 AM   6:06:38 AM            
Sunset / PM Twilight   6:39:35 PM   7:08:17 PM            
Length Of Day   12:05:31                          
Special Conditions   None                                  
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