Portsmouth Rhode Island Weather Almanac  
Monday, July 29, 2024  
Cloudy, Heavy Rain and Fog AM, Partly Cloudy PM, Light Winds and Much Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    July 29, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   71   84   80   -9   92   in 1949   67   in 1926  
Minimum Temperature   61   66   65   -4   73   in 1995   55   in 1977  
Average Temperature   66   75   73   -7   82   in 1949   62   in 1914  
 Month Avg Max Temperature   81.3   82.1   79.7   +1.6   84.8   in 1952   74.0   in 1902  
Month Avg Min Temperature   67.7   68.0   64.6   +3.1   70.0   in 2013   59.3   in 1962  
Month Average Temperature   74.7   75.3   72.6   +2.2   76.2   in 2013   67.8   in 1902  
High Heat Index   74   94   82   -8   100   in 1949            
Low Wind Chill                                      
Heating Degree Days   0   0   0   +0   3   in 1914   0   in 2024  
Month Heating DD   0   0   3   -3   28   in 1914   0   in 2024  
Season Heating DD   0   0   3   -3   3   in 1914   0   in 2024    
Cooling Degree Days   1   10   8   -7   17   in 1949   0   in 2017    
Month Cooling DD   282   299   219   +63   326   in 2013   95   in 1902    
Year Cooling DD   420   375   312   +108   463   in 2010   120   in 1902    
Maximum Dew Point   70   78   70   +0   78   in 2023   50   in 1968    
Minimum Dew Point   61   65   61   +0   70   in 2007   44   in 1968    
Average  Dew Point   66   72   65   +1   73   in 1995   47   in 1968  
 Month Avg Max Dew Point   72.9   74.8   68.6   +4.3   74.8   in 2023   61.9   in 1962  
Month Avg Min Dew Point   65.0   66.5   60.2   +4.8   67.4   in 2013   52.0   in 1965  
Month Average Dew Point   69.0   70.6   64.4   +4.6   70.6   in 2023   57.1   in 1965  
Precipitation   1.70   .24   .10   +1.60   2.10   in 1897            
One Hour Rain   .33   .20           .90   in 2002            
Half Hour Rain   .23   .12           .23   in 2024            
Hourly Rain Rate   1.87   .90           1.87   in 2024            
Month Precipitation   3.35   5.77   2.88   +.47   8.73   in 2009   .36   in 1952  
Year Precipitation   37.30   30.25   25.58   +11.72   41.06   in 1998   14.31   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 29, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   99%   99%   94%   +5%   100%   in 2016   70%   in 1956  
Minimum Humidity   89%   77%   62%   +27%   93%   in 1986   33%   in 1968  
Average Humidity   94%   88%   78%   +16%   97%   in 1986   52%   in 1968  
Maximum Barometer   30.04   29.92   30.01   +00.03   30.33   in 1984   29.77   in 1966  
Minimum Barometer   29.98   29.62   29.82   +00.16   30.24   in 1996   29.48   in 1981  
Average Barometer   30.01   29.77   29.91   +00.10   30.28   in 1996   29.65   in 1966  
Average Wind   4.7   7.8   5.5   -0.8   11.4   in 1968   1.6   in 1996  
Direction   W   SSW   SSW       WNW         SSE        
High Wind Gust   18   35   20   -2   44   in 1941   10   in 1991  
Direction   WNW   SSW   SSW       NE         NNE        
Maximum Water Temp   70.3   77.4   71.9   -1.6   77.4   in 2023   68.5   in 2017  
Minimum Water Temp   69.6   73.9   68.4   +1.2   73.9   in 2023   #N/A   in 2003  
Average Water Temp   70.0   75.7   70.1   -0.2   75.7   in 2023   66.3   in 2017  
Sunrise/ AM Twilight   5:37:16 AM   5:06:54 AM            
Sunset / PM Twilight   8:05:11 PM   8:36:30 PM            
Length Of Day   14:29:28                          
Special Conditions   Fog                                  
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