Portsmouth Rhode Island Weather Almanac  
Monday, September 9, 2024  
Clear early, Partly Cloudy Day to Clear PM, Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    September 9, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   73   84   74   -1   91   in 2016   62   in 1919  
Minimum Temperature   55   73   59   -4   73   in 2023   45   in 1952  
Average Temperature   64   79   67   -3   81   in 2016   56   in 1938  
 Month Avg Max Temperature   75.3   83.4   75.3   +0.0   84.7   in 1983   69.0   in 1994  
Month Avg Min Temperature   57.4   66.0   60.3   -2.9   68.0   in 1898   51.4   in 1893  
Month Average Temperature   66.6   74.9   67.9   -1.3   75.7   in 1959   62.1   in 1994  
High Heat Index   72   96   76   -4   100   in 2016            
Low Wind Chill                             43   in 1952  
Heating Degree Days   1   0   1   +0   9   in 1938   0   in 2023  
Month Heating DD   6   1   9   -3   33   in 1994   0   in 2021  
Season Heating DD   8   1   16   -8   54   in 1914   0   in 2021    
Cooling Degree Days   0   14   3   -3   16   in 2016   0   in 2024    
Month Cooling DD   20   90   33   -13   96   in 1959   0   in 1893    
Year Cooling DD   666   662   570   +96   826   in 2020   279   in 1902    
Maximum Dew Point   60   78   64   -4   78   in 2023   46   in 1956    
Minimum Dew Point   48   73   55   -7   73   in 2023   36   in 1980    
Average  Dew Point   54   76   59   -5   76   in 2023   44   in 1956  
 Month Avg Max Dew Point   62.9   73.4   65.0   -2.1   73.4   in 2023   52.9   in 1984  
Month Avg Min Dew Point   52.4   64.7   56.0   -3.6   64.7   in 2023   43.6   in 1984  
Month Average Dew Point   57.9   69.2   60.4   -2.6   69.2   in 2023   48.2   in 1984  
Precipitation   .00   .00   .12   -.12   2.59   in 1969            
One Hour Rain   .00   .00           .47   in 1969            
Half Hour Rain   .00   .00           .25   in 2008            
Hourly Rain Rate   .00   .00           3.03   in 2008            
Month Precipitation   .16   .00   1.02   -.86   7.57   in 2021   .00   in 2015  
Year Precipitation   40.85   35.62   30.43   +10.42   46.33   in 1998   16.94   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 9, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   85%   99%   93%   -8%   100%   in 2005   69%   in 1980  
Minimum Humidity   53%   83%   59%   -6%   90%   in 1999   29%   in 1957  
Average Humidity   69%   91%   76%   -7%   95%   in 1999   52%   in 1980  
Maximum Barometer   30.08   30.13   30.12   -00.04   30.44   in 1986   29.72   in 2010  
Minimum Barometer   30.00   30.04   29.93   +00.07   30.23   in 2020   29.41   in 1987  
Average Barometer   30.04   30.09   30.03   +00.01   30.32   in 1952   29.62   in 1969  
Average Wind   6.4   5.3   5.5   +0.9   10.8   in 1969   2.3   in 1961  
Direction   SSW   S   SSW       NNE         SSW        
High Wind Gust   26   14   20   +6   45   in 1949   11   in 2020  
Direction   SSW   SSE   SSW       NW         SSE        
Maximum Water Temp   68.2   74.8   70.2   -2.0   74.8   in 2023   65.7   in 1997  
Minimum Water Temp   66.6   72.9   67.8   -1.2   72.9   in 2023   63.9   in 2004  
Average Water Temp   67.4   73.9   69.0   -1.6   73.9   in 2023   65.0   in 2017  
Sunrise/ AM Twilight   6:19:48 AM   5:52:01 AM            
Sunset / PM Twilight   7:03:45 PM   7:32:49 PM            
Length Of Day   12:43:57                          
Special Conditions   None                                  
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