Portsmouth Rhode Island Weather Almanac
Monday, August 17, 2020
Cloudy, Light Rain early, Partly Cloudy Day to Mostly Cloudy PM, Seasonal Temperatures
Climate Normal Period Climate Record Period  
1981- 2010   1893 - 2020  
    August 17, 2020     Record Record
Observed Daily Data   Observed   2019   Normal   Depart   Highest Lowest
Maximum Temperature   79   77   78   +1   91   in 2002   65   in 1909  
Minimum Temperature   62   66   63   -1   74   in 1955   52   in 1981  
Average Temperature   71   72   71   +0   81   in 2002   61   in 1909  
Precipitation   .02   .00   .12   -.10   1.65   in 1909            
One Hour   .02   .00           .90   in 1997            
Snow   0.0   0.0   0.0   +0.0   0.0   in              
Snow Depth   0   0           0   in            
HDD   0   0   0   +0   4   in 1909   0   in 2020  
CDD   6   7   6   +0   16   in 2002   0   in 2000  
Maximum Dew Point   65   72   67   -2   76   in 2010   51   in 1981  
Minimum Dew Point   60   65   58   +2   72   in 1955   43   in 1961  
Average  Dew Point   63   69   62   +1   74   in 1955   49   in 1981  
Maximum Humidity   94%   98%   93%   +1%   100%   in 2003   77%   in 1980  
Minimum Humidity   57%   82%   60%   -3%   95%   in 1998   30%   in 2007  
Average Humidity   76%   90%   76%   -1%   98%   in 1998   55%   in 1980  
Maximum Barometer   29.90   30.09   30.04   -00.14   30.37   in 1947   29.71   in 1952  
Minimum Barometer   29.84   29.99   29.85   -00.01   30.20   in 1994   29.44   in 1977  
Average Barometer   29.87   30.04   29.94   -00.07   30.25   in 1994   29.65   in 1958  
Average Wind   6.2   6.0   5.9   +0.3   12.8   in 1969   1.7   in 1964  
Direction   NNE   SE   SSW       WSW         SSE        
High Wind Gust   25   17   20   +5   35   in 1981   10   in 2004  
Direction   NNE   SE   SSW       NNW         SSE        
High Heat Index   79   80   81   -2   98   in 2002            
Wind Chill                             #N/A   in #N/A  
Maximum Water Temp   66.8   73.1   71.9   -5.1   75.5   in 2016   66.8   in 2020  
Minimum Water Temp   64.9   71.2   68.8   -3.9   73.6   in 2018   64.9   in 2020  
Average Water Temp   65.9   72.2   70.3   -4.5   74.4   in 2018   65.9   in 2020  
Sunrise/ AM Twilight   5:57:02 AM   5:27:35 AM            
Sunset / PM Twilight   7:41:15 PM   8:10:42 PM            
Length Of Day   13:44:13                          
Special Conditions   Fog                                  
Comments      
    August 17, 2020     Record Record
Month-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
 Avg Maximum Temperature   83.5   81.5   78.9   +4.6   85.5   in 1944   72.1   in 1964  
Avg Minimum Temperature   68.4   64.9   64.6   +3.8   71.6   in 1988   55.7   in 1964  
Average Temperature   76.2   73.5   71.8   +4.4   78.4   in 1988   64.2   in 1964  
Total Precipitation   .80   .66   2.01   -1.21   7.57   in 1946   .07   in 1940  
Total Snow   0.0   0.0   0.0   +0.0   0.0   in     0.0   in    
Total HDD   0   0   0   +0   24   in 1964   0   in 2020  
Total CDD   190   144   124   +66   227   in 1988   11   in 1964  
Avg Maximum Dew Point   72.1   68.3   68.0   +4.0   74.1   in 2018   57.5   in 1964  
Avg Minimum Dew Point   64.3   59.6   59.9   +4.4   67.9   in 2018   46.9   in 1964  
Average  Dew Point   68.2   64.0   64.0   +4.2   71.0   in 2018   52.2   in 1964  
    August 17, 2020     Record Record
Year-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
Total Precipitation   23.18   35.89   29.82   -6.64   43.87   in 1983   15.70   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   24   in 1964   0   in 2020  
Total CDD (since Jan 1)   654   564   428   +226   654   in 2020   208   in 1902  
                             
Hour-by-Hour Weather For August 17, 2020  
Climate Weather for August 17  
Weather History For August 17  
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