Portsmouth Rhode Island Weather Almanac  
Tuesday, September 24, 2024  
Partly Cloudy early, Mostly Cloudy Day to Partly Cloudy PM, Continued Cool  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    September 24, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   66   62   70   -4   82   in 2017   55   in 1992  
Minimum Temperature   53   59   55   -2   67   in 2011   39   in 1953  
Average Temperature   60   61   62   -2   73   in 1984   48   in 1992  
 Month Avg Max Temperature   73.5   76.8   73.0   +0.5   79.6   in 1983   67.7   in 1963  
Month Avg Min Temperature   57.2   62.4   58.3   -1.1   63.4   in 1961   52.1   in 1962  
Month Average Temperature   65.5   69.9   65.6   -0.1   71.5   in 1961   60.6   in 1963  
High Heat Index   66   63   69   -3   84   in 1984            
Low Wind Chill                             36   in 1992  
Heating Degree Days   5   4   4   +1   17   in 1992   0   in 2021  
Month Heating DD   29   19   45   -16   118   in 1963   2   in 2021  
Season Heating DD   31   19   52   -21   149   in 1956   2   in 2021    
Cooling Degree Days   0   0   1   -1   8   in 1984   0   in 2024    
Month Cooling DD   42   136   60   -18   170   in 1961   7   in 1893    
Year Cooling DD   688   708   597   +91   843   in 2020   283   in 1902    
Maximum Dew Point   58   62   61   -3   72   in 2021   37   in 1950    
Minimum Dew Point   51   58   50   +1   66   in 2011   26   in 1963    
Average  Dew Point   55   60   56   -1   69   in 2011   33   in 1963  
 Month Avg Max Dew Point   63.3   68.3   63.4   -0.1   68.3   in 2023   55.5   in 1984  
Month Avg Min Dew Point   53.8   60.0   53.8   +0.0   60.0   in 2023   44.8   in 1984  
Month Average Dew Point   58.8   64.3   58.5   +0.3   64.3   in 2023   50.2   in 1984  
Precipitation   .00   .36   .13   -.13   2.26   in 1975            
One Hour Rain   .00   .05           .40   in 2019            
Half Hour Rain   .00   .04           .29   in 2019            
Hourly Rain Rate   .00   .46           1.82   in 2019            
Month Precipitation   1.69   4.96   2.97   -1.28   9.58   in 1960   .31   in 1959  
Year Precipitation   42.38   40.58   32.38   +10.00   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 24, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   98%   99%   91%   +7%   100%   in 2017   70%   in 1950  
Minimum Humidity   68%   97%   57%   +11%   98%   in 1973   32%   in 1963  
Average Humidity   83%   98%   74%   +9%   99%   in 1973   55%   in 1988  
Maximum Barometer   30.19   30.13   30.15   +00.04   30.61   in 1953   29.69   in 1966  
Minimum Barometer   30.09   30.02   29.94   +00.15   30.41   in 2008   29.43   in 1987  
Average Barometer   30.14   30.08   30.04   +00.10   30.49   in 2014   29.59   in 1964  
Average Wind   6.6   10.5   6.2   +0.4   13.0   in 1966   1.9   in 1994  
Direction   NNE   NE   WNW       W         SE        
High Wind Gust   18   23   21   -3   39   in 1931   10   in 2017  
Direction   NNE   NE   NNE       NW         NNE        
Maximum Water Temp   65.1   65.8   67.1   -2.0   71.8   in 2021   63.8   in 2013  
Minimum Water Temp   64.2   65.3   65.2   -1.0   70.5   in 2021   61.9   in 1997  
Average Water Temp   64.7   65.6   66.2   -1.5   71.2   in 2021   62.9   in 1997  
Sunrise/ AM Twilight   6:35:06 AM   6:07:40 AM            
Sunset / PM Twilight   6:37:51 PM   7:06:33 PM            
Length Of Day   12:02:45                          
Special Conditions   None                                  
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