Portsmouth Rhode Island Weather Almanac  
Friday, June 4, 2021  
Dense Fog early, then Cloudy with Fog, Mild and Humid  
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    June 5, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   68   76   70   -2   90   in 1919   54   in 1945  
Minimum Temperature   59   61   54   +5   63   in 1963   43   in 1907  
Average Temperature   64   69   62   +2   75   in 1919   51   in 1945  
 Month Avg Max Temperature   70.5   71.8   70.0   +0.5   81.8   in 1925   55.8   in 1907  
Month Avg Min Temperature   55.8   51.3   53.5   +2.3   60.5   in 2010   44.5   in 1907  
Month Average Temperature   63.5   61.8   62.0   +1.5   70.5   in 1925   50.3   in 1907  
HDD   1   0   4   -3   14   in 1945   0   in 2020  
Month HDD   6   19   15   -9   59   in 1907   0   in 1999  
Season HDD   5051   5111   5443   -392   6554   in 1905   4494   in 2012  
CDD   0   4   1   -1   10   in 1919   0   in    
Month CDD   0   6   4   -4   27   in 1895   0   in 2021  
Year CDD   17   14   15   +3   55   in 1991   0   in 2003  
Maximum Dew Point   66   68   59   +7   70   in 2016   44   in 1998  
Minimum Dew Point   59   59   49   +10   62   in 1963   34   in 1964  
Average  Dew Point   63   64   54   +9   65   in 2010   40   in 1998  
 Month Avg Max Dew Point   62.0   57.8   59.0   +3.0   67.0   in 2010   47.3   in 1953  
Month Avg Min Dew Point   52.3   47.0   48.8   +3.5   58.8   in 2010   35.5   in 1953  
Month Average Dew Point   57.1   52.4   53.8   +3.4   62.9   in 2010   41.4   in 1953  
Precipitation   .01   .13   .12   -.11   2.12   in 2007            
One Hour   .01   .04           .89   in 2007            
Hourly Rate   .00   .31           6.00   in 2007            
Month Precipitation   .13   .00   .45   -.32   2.61   in 2007   .00   in 2020  
Year Precipitation   17.13   19.21   19.49   -2.36   36.73   in 1983   11.66   in 1905  
Snow   0.0   0.0   #####   #####   0.0   in              
Snow Depth   0   0           43986   in              
Month Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in    
Season Snow   27.7   12.9   33.5   -5.8   84.1   in 1996   5.0   in 1998  
    June 5, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   100%   96%   92%   +8%   100%   in 2021   69%   in 1998  
Minimum Humidity   88%   75%   57%   +31%   94%   in 1979   28%   in 1977  
Average Humidity   94%   86%   75%   +19%   97%   in 1979   50%   in 1977  
Maximum Barometer   29.96   29.95   30.02   -00.06   30.39   in 1976   29.63   in 1954  
Minimum Barometer   29.87   29.87   29.81   +00.06   30.22   in 1958   29.29   in 2007  
Average Barometer   29.92   29.91   29.92   -00.00   30.30   in 1976   29.56   in 2007  
Average Wind   5.9   6.9   6.5   -0.6   12.1   in 1986   1.9   in 2009  
Direction   SW   SSW   SW       SW         SSE        
High Wind Gust   22   20   22   -0   36   in 1986   10   in 1987  
Direction   SW   S   SW       SW         S        
High Heat Index   71   79   70   +1   84   in 1971            
Low Wind Chill                             36   in 1965  
Maximum Water Temp   59.7   55.0   60.5   -0.8   67.8   in 2010   55.0   in 2020  
Minimum Water Temp   58.8   51.5   57.1   +1.7   62.2   in 2010   51.5   in 2020  
Average Water Temp   59.3   53.3   58.8   +0.4   65.0   in 2010   53.3   in 2020  
Sunrise/ AM Twilight   5:12:09 AM   4:38:43 AM            
Sunset / PM Twilight   8:15:24 PM   8:48:51 PM            
Length Of Day   15:03:15                          
Special Conditions   Dense Fog                              
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