Portsmouth Rhode Island Weather Almanac
Wednesday, August 12, 2020
Cloudy and Fog early, Partly Cloudy Day w/Haze, Mostly Cloudy PM, Hot and Very Muggy
Climate Normal Period Climate Record Period  
1981- 2010   1893 - 2020  
    August 12, 2020     Record Record
Observed Daily Data   Observed   2019   Normal   Depart   Highest Lowest
Maximum Temperature   90   84   79   +11   92   in 1944   63   in 1979  
Minimum Temperature   74   61   64   +10   74   in 2020   51   in 1968  
Average Temperature   82   73   72   +10   82   in 2020   60   in 1979  
Precipitation   .00   .00   .12   -.12   2.30   in 1983            
One Hour   .00   .00           .92   in 1983            
Snow   0.0   0.0   0.0   +0.0   0.0   in              
Snow Depth   0   0           0   in            
HDD   0   0   0   +0   5   in 1979   0   in 2020  
CDD   17   8   7   +10   17   in 2020   0   in 1983  
Maximum Dew Point   78   64   68   +11   78   in 2020   50   in 1968  
Minimum Dew Point   71   56   59   +12   71   in 2020   44   in 2006  
Average  Dew Point   75   60   63   +12   75   in 2020   47   in 1968  
Maximum Humidity   97%   84%   94%   +3%   100%   in 2018   63%   in 1950  
Minimum Humidity   57%   45%   61%   -4%   92%   in 1955   33%   in 1974  
Average Humidity   77%   65%   78%   -1%   96%   in 1955   52%   in 1950  
Maximum Barometer   30.05   29.99   30.05   +00.00   30.34   in 1986   29.77   in 2008  
Minimum Barometer   29.97   29.88   29.86   +00.11   30.17   in 1994   29.53   in 1964  
Average Barometer   30.01   29.94   29.96   +00.05   30.23   in 1994   29.68   in 1964  
Average Wind   6.7   5.3   5.6   +1.1   12.5   in 1979   1.8   in 1994  
Direction   SW   SSW   SSW       NNE         SSE        
High Wind Gust   26   24   20   +6   34   in 1983   9   in 1951  
Direction   SW   SSW   WSW       NNE         SE        
High Heat Index   102   84   80   +22   102   in 2020            
Wind Chill                             #N/A   in #N/A  
Maximum Water Temp   73.2   74.1   72.1   +1.1   77.0   in 2003   68.3   in 2017  
Minimum Water Temp   70.2   71.4   68.7   +1.5   73.8   in 2012   63.6   in 2004  
Average Water Temp   71.7   72.8   70.4   +1.3   75.0   in 2012   66.9   in 2017  
Sunrise/ AM Twilight   5:51:56 AM   5:22:02 AM            
Sunset / PM Twilight   7:48:21 PM   8:18:16 PM            
Length Of Day   13:56:25                          
Special Conditions   Fog, Haze                              
Comments   Record breaking heat and dew points  
    August 12, 2020     Record Record
Month-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
 Avg Maximum Temperature   85.5   82.5   79.0   +6.5   85.5   in 2020   71.5   in 1903  
Avg Minimum Temperature   69.5   64.8   64.9   +4.6   71.9   in 1988   56.3   in 1964  
Average Temperature   77.7   73.9   72.0   +5.7   78.6   in 1988   64.8   in 1964  
Total Precipitation   .12   .19   1.41   -1.29   6.82   in 1952   T   in 2005  
Total Snow   0.0   0.0   0.0   +0.0   0.0   in     0.0   in    
Total HDD   0   0   0   +0   18   in 1903   0   in 2020  
Total CDD   152   107   91   +61   163   in 1988   11   in 1964  
Avg Maximum Dew Point   73.5   67.6   68.6   +4.9   74.3   in 2018   58.9   in 1964  
Avg Minimum Dew Point   65.3   58.7   60.4   +4.8   69.4   in 2003   48.4   in 1964  
Average  Dew Point   69.4   63.1   64.5   +4.9   71.4   in 2003   53.7   in 1964  
    August 12, 2020     Record Record
Year-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
Total Precipitation   22.50   35.42   29.22   -6.72   43.87   in 1983   15.63   in 1957  
Total Snow (since Jul 1 20)   0.0   0.0   0.0   +0.0   0.0   in     0.0   in    
Total HDD (since Jul 1 20)   0   0   3   -3   18   in 1903   0   in 2020  
Total CDD (since Jan 1)   616   527   395   +221   616   in 2020   203   in 1902  
                             
Hour-by-Hour Weather For August 12, 2020  
Climate Weather for August 12  
Weather History For August 12  
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