Portsmouth Rhode Island Weather Almanac  
Thursday, July 18, 2024  
Mostly Cloudy, Light Rain & Fog early then Partly Cloudy, Continued Very Warm But Less Humid  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    July 18, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   85   81   80   +5   92   in 2012   68   in 1913  
Minimum Temperature   72   71   65   +7   74   in 2013   53   in 1956  
Average Temperature   79   76   73   +6   83   in 2013   64   in 1962  
 Month Avg Max Temperature   82.3   81.5   79.6   +2.7   85.0   in 1955   74.4   in 1906  
Month Avg Min Temperature   69.1   68.2   64.3   +4.8   70.9   in 2013   57.5   in 1962  
Month Average Temperature   75.9   75.2   72.3   +3.6   77.1   in 2013   67.4   in 2009  
High Heat Index   90   87   85   +5   106   in 2012            
Low Wind Chill                                      
Heating Degree Days   0   0   0   +0   1   in 1962   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   14   11   8   +6   18   in 2013   0   in 1989    
Month Cooling DD   196   183   131   +65   218   in 2013   52   in 1895    
Year Cooling DD   334   259   224   +110   339   in 2010   86   in 1918    
Maximum Dew Point   74   77   69   +5   77   in 2023   53   in 1976    
Minimum Dew Point   62   69   61   +1   72   in 2013   45   in 1993    
Average  Dew Point   68   73   65   +3   75   in 2013   51   in 1956  
 Month Avg Max Dew Point   74.3   75.0   68.3   +6.0   75.0   in 2023   60.1   in 1978  
Month Avg Min Dew Point   66.8   67.2   59.7   +7.1   68.4   in 2013   50.5   in 1962  
Month Average Dew Point   70.5   71.1   64.0   +6.5   71.3   in 2013   55.6   in 1962  
Precipitation   .01   T   .09   -.08   .98   in 2007            
One Hour Rain   .01   T           .71   in 2006            
Half Hour Rain   .01   .00           .64   in 2006            
Hourly Rain Rate   .00   .00           7.38   in 2006            
Month Precipitation   .91   5.46   1.82   -.91   5.46   in 2023   T   in 1982  
Year Precipitation   34.86   29.94   24.52   +10.34   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 18, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   99%   99%   93%   +6%   100%   in 2017   77%   in 1969  
Minimum Humidity   59%   86%   59%   -0%   92%   in 2005   27%   in 1957  
Average Humidity   79%   93%   76%   +3%   96%   in 2005   54%   in 1993  
Maximum Barometer   29.96   30.01   30.03   -00.07   30.38   in 1935   29.74   in 1997  
Minimum Barometer   29.77   29.92   29.85   -00.08   30.10   in 1967   29.56   in 1984  
Average Barometer   29.87   29.97   29.94   -00.07   30.15   in 1967   29.70   in 1997  
Average Wind   6.3   6.0   5.3   +1.0   10.7   in 1974   1.3   in 1994  
Direction   NW   SSW   SSW       SW         N        
High Wind Gust   17   18   20   -3   42   in 2012   10   in 1994  
Direction   WSW   SSW   SSW       NNW         N        
Maximum Water Temp   76.5   74.7   71.9   +4.6   77.8   in 2013   68.3   in 2004  
Minimum Water Temp   73.6   72.1   68.0   +5.6   73.6   in 2024   63.1   in 2001  
Average Water Temp   75.1   73.4   70.0   +5.1   75.1   in 2024   65.8   in 2004  
Sunrise/ AM Twilight   5:27:08 AM   4:55:37 AM            
Sunset / PM Twilight   8:15:08 PM   8:47:33 PM            
Length Of Day   14:49:11                          
Special Conditions   Fog                                  
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