Portsmouth Rhode Island Weather Almanac  
Saturday, August 17, 2024  
Cloudy Morning, Partly Cloudy Day to Cloudy Evening, Seasonal Temperatrues  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    August 17, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   76   74   78   -2   91   in 2002   65   in 1909  
Minimum Temperature   64   64   64   +0   74   in 1955   52   in 1981  
Average Temperature   70   69   71   -1   81   in 2002   61   in 1909  
 Month Avg Max Temperature   80.6   78.4   79.2   +1.4   84.4   in 1988   72.1   in 1964  
Month Avg Min Temperature   65.2   64.3   64.5   +0.7   71.6   in 1988   55.7   in 1964  
Month Average Temperature   73.2   71.6   71.8   +1.4   78.4   in 1988   64.2   in 1964  
High Heat Index   78   76   81   -3   98   in 2002            
Low Wind Chill                             49   in 1957  
Heating Degree Days   0   0   0   +0   4   in 1909   0   in 2024  
Month Heating DD   1   0   0   +1   24   in 1964   0   in 2023  
Season Heating DD   1   0   3   -2   34   in 1914   0   in 2023    
Cooling Degree Days   5   4   7   -2   16   in 2002   0   in 2000    
Month Cooling DD   140   115   126   +14   227   in 1988   11   in 1964    
Year Cooling DD   582   499   454   +128   654   in 2020   208   in 1902    
Maximum Dew Point   68   69   68   +0   76   in 2010   51   in 1981    
Minimum Dew Point   61   63   59   +2   72   in 1955   43   in 1961    
Average  Dew Point   65   66   64   +1   74   in 1955   49   in 1981  
 Month Avg Max Dew Point   70.8   69.1   68.7   +2.1   74.1   in 2018   57.5   in 1964  
Month Avg Min Dew Point   62.4   59.8   60.7   +1.6   67.9   in 2018   46.9   in 1964  
Month Average Dew Point   66.6   64.4   64.6   +1.9   71.0   in 2018   52.2   in 1964  
Precipitation   .00   .01   .12   -.12   1.65   in 1909            
One Hour Rain   .00   .01           .90   in 1997            
Half Hour Rain   .00   .01           .11   in 2010            
Hourly Rain Rate   .00   .00           2.35   in 2010            
Month Precipitation   1.34   3.57   2.03   -.69   7.57   in 1946   .07   in 1940  
Year Precipitation   39.61   33.82   27.81   +11.80   43.87   in 1983   15.70   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                                      
    August 17, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   93%   99%   93%   -0%   100%   in 2003   77%   in 1980  
Minimum Humidity   76%   81%   59%   +17%   95%   in 1998   30%   in 2007  
Average Humidity   85%   90%   76%   +8%   98%   in 1998   55%   in 1980  
Maximum Barometer   30.08   30.02   30.04   +00.04   30.37   in 1947   29.71   in 1952  
Minimum Barometer   30.00   29.86   29.86   +00.14   30.20   in 1994   29.44   in 1977  
Average Barometer   30.04   29.94   29.95   +00.09   30.25   in 1994   29.65   in 1958  
Average Wind   5.1   3.8   5.8   -0.7   12.8   in 1969   1.7   in 1964  
Direction   SSE   E   SSW       WSW         SSE        
High Wind Gust   16   11   20   -4   35   in 1981   10   in 2004  
Direction   SSE   ENE   SSW       NNW         SSE        
Maximum Water Temp   72.3   70.2   72.0   +0.3   75.5   in 2016   66.8   in 2020  
Minimum Water Temp   71.1   69.4   69.0   +2.1   73.6   in 2018   64.9   in 2020  
Average Water Temp   71.7   69.8   70.5   +1.2   74.4   in 2018   65.9   in 2020  
Sunrise/ AM Twilight   5:56:24 AM   4:54:40 AM            
Sunset / PM Twilight   7:40:51 PM   8:48:22 PM            
Length Of Day   13:44:27                          
Special Conditions   None                                  
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Hour-by-Hour Weather For August 17, 2024
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