Portsmouth Rhode Island Weather Almanac  
Saturday, September 14, 2024  
Partly Cloudy & Fog early, Clear Day to Partly Cloudy PM, Very Light Winds, Much Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    September 14, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   84   78   73   +11   84   in 2024   58   in 1964  
Minimum Temperature   62   63   58   +4   69   in 1947   43   in 1963  
Average Temperature   73   71   65   +8   76   in 1903   52   in 1963  
 Month Avg Max Temperature   76.1   82.1   74.6   +1.6   83.4   in 1983   68.9   in 1917  
Month Avg Min Temperature   57.4   66.4   59.6   -2.3   67.0   in 1961   51.6   in 1893  
Month Average Temperature   66.9   74.6   67.1   -0.2   75.4   in 1961   62.2   in 1893  
High Heat Index   88   78   73   +15   88   in 2024            
Low Wind Chill                             39   in 1963  
Heating Degree Days   0   0   2   -2   13   in 1963   0   in 2024  
Month Heating DD   7   1   16   -9   57   in 1913   0   in 2015  
Season Heating DD   9   1   23   -14   94   in 1914   0   in 2015    
Cooling Degree Days   8   6   2   +6   11   in 1903   0   in 2019    
Month Cooling DD   33   135   45   -12   145   in 1961   1   in 1893    
Year Cooling DD   679   707   582   +97   837   in 2020   280   in 1902    
Maximum Dew Point   70   68   63   +7   74   in 1961   43   in 1975    
Minimum Dew Point   61   55   53   +8   67   in 2005   32   in 1959    
Average  Dew Point   66   62   58   +8   71   in 1961   38   in 1959  
 Month Avg Max Dew Point   63.4   73.5   64.5   -1.1   73.5   in 2023   54.6   in 1967  
Month Avg Min Dew Point   52.9   64.8   55.2   -2.4   64.8   in 2023   43.6   in 1967  
Month Average Dew Point   58.4   69.3   59.8   -1.4   69.3   in 2023   49.1   in 1967  
Precipitation   .00   .00   .13   -.13   2.62   in 1944            
One Hour Rain   .00   .00           .44   in 1956            
Half Hour Rain   .00   .00           .09   in 2008            
Hourly Rain Rate   .00   .00           .49   in 2008            
Month Precipitation   .16   2.28   1.63   -1.47   7.60   in 2021   T   in 2005  
Year Precipitation   40.85   37.90   31.04   +9.81   46.33   in 1998   17.43   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 14, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   99%   99%   94%   +5%   100%   in 2005   73%   in 1953  
Minimum Humidity   61%   56%   62%   -1%   96%   in 2008   32%   in 1959  
Average Humidity   80%   78%   78%   +2%   97%   in 2008   55%   in 1959  
Maximum Barometer   30.31   30.05   30.12   +00.19   30.54   in 1985   29.63   in 1971  
Minimum Barometer   30.21   29.92   29.89   +00.32   30.29   in 2004   28.38   in 1944  
Average Barometer   30.26   29.99   30.00   +00.26   30.36   in 2004   29.50   in 1971  
Average Wind   2.6   6.3   6.4   -3.8   14.2   in 1979   1.5   in 2006  
Direction   ENE   NNW   SSW       S         SE        
High Wind Gust   13   17   22   -9   88   in 1944   12   in 2018  
Direction   W   NNW   SSW       SE         ENE        
Maximum Water Temp   70.0   72.3   69.3   +0.7   72.3   in 2023   65.5   in 2006  
Minimum Water Temp   66.9   71.1   67.3   -0.4   71.1   in 2023   64.4   in 2006  
Average Water Temp   68.5   71.7   68.3   +0.2   71.7   in 2023   65.0   in 2006  
Sunrise/ AM Twilight   6:24:52 AM   5:57:16 AM            
Sunset / PM Twilight   6:55:09 PM   7:24:03 PM            
Length Of Day   12:30:17                          
Special Conditions   Dense Fog  
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