Portsmouth Rhode Island Weather Almanac  
Wednesday, July 17, 2024  
Partly Cloudy to Cloudy and Fog PM, Cooler, Continued Muggy  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    July 17, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   85   84   80   +5   90   in 1953   67   in 1989  
Minimum Temperature   71   71   65   +6   72   in 2021   49   in 1954  
Average Temperature   78   78   73   +5   80   in 2021   63   in 1989  
 Month Avg Max Temperature   82.1   81.5   79.5   +2.6   84.8   in 1993   73.9   in 1906  
Month Avg Min Temperature   68.9   68.1   64.2   +4.6   70.7   in 2013   57.5   in 1962  
Month Average Temperature   75.7   75.1   72.2   +3.5   76.8   in 2013   66.9   in 1933  
High Heat Index   93   95   84   +9   100   in 2021            
Low Wind Chill                             49   in 1954  
Heating Degree Days   0   0   0   +0   2   in 1989   0   in 2024  
Month Heating DD   0   0   3   -3   23   in 1914   0   in 2024  
Season Heating DD   0   0   3   -3   23   in 1914   0   in 2024    
Cooling Degree Days   13   13   8   +5   15   in 2021   0   in 2020    
Month Cooling DD   182   172   123   +59   200   in 2013   44   in 2009    
Year Cooling DD   320   248   216   +104   324   in 2010   78   in 2009    
Maximum Dew Point   78   77   69   +9   79   in 2021   53   in 1966    
Minimum Dew Point   68   71   61   +7   71   in 2023   44   in 1993    
Average  Dew Point   73   74   65   +8   75   in 2021   49   in 1993  
 Month Avg Max Dew Point   74.3   74.9   68.2   +6.1   74.9   in 2023   59.8   in 1978  
Month Avg Min Dew Point   67.1   67.2   59.6   +7.4   68.2   in 2013   50.3   in 1962  
Month Average Dew Point   70.7   71.1   63.9   +6.7   71.1   in 2013   55.4   in 1962  
Precipitation   .00   .01   .09   -.09   2.67   in 1989            
One Hour Rain   .00   .01           .69   in 1989            
Half Hour Rain   .00   .01           .07   in 2020            
Hourly Rain Rate   .00   .00           2.07   in 2009            
Month Precipitation   .90   5.46   1.73   -.83   5.46   in 2023   T   in 1982  
Year Precipitation   34.85   29.94   24.43   +10.42   40.76   in 1998   13.52   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                                      
    July 17, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   99%   99%   92%   +7%   100%   in 2017   64%   in 1952  
Minimum Humidity   68%   72%   57%   +11%   91%   in 2005   29%   in 1957  
Average Humidity   84%   86%   74%   +9%   96%   in 2005   51%   in 1952  
Maximum Barometer   29.89   30.00   30.04   -00.15   30.39   in 1945   29.77   in 1983  
Minimum Barometer   29.77   29.82   29.87   -00.10   30.09   in 2005   29.53   in 1980  
Average Barometer   29.83   29.91   29.95   -00.12   30.17   in 1990   29.68   in 1983  
Average Wind   6.2   4.1   5.3   +0.9   12.1   in 1971   2.2   in 2006  
Direction   SSW   SSW   SSW       SW         SSE        
High Wind Gust   22   17   20   +2   36   in 1989   12   in 2017  
Direction   SW   SSW   SSW       NE         SSE        
Maximum Water Temp   76.5   74.1   71.6   +4.9   78.4   in 2013   66.7   in 2020  
Minimum Water Temp   74.9   71.2   67.5   +7.4   71.9   in 2021   62.1   in 2001  
Average Water Temp   75.7   72.7   69.6   +6.1   74.0   in 2013   65.7   in 2020  
Sunrise/ AM Twilight   5:26:17 AM   4:54:40 AM            
Sunset / PM Twilight   8:15:51 PM   8:48:22 PM            
Length Of Day   14:50:44                          
Special Conditions   Fog                                  
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