Portsmouth Rhode Island Weather Almanac  
Saturday, June 5, 2021  
Dense Fog Early, Clear Day to Partly Cloudy Evening and Warmer  
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   79   76   71   +8   90   in 1925   53   in 1945  
Minimum Temperature   59   61   54   +5   67   in 1925   44   in 1944  
Average Temperature   69   69   63   +6   79   in 1925   49   in 1945  
 Month Avg Max Temperature   72.2   72.6   70.2   +2.0   83.4   in 1925   55.6   in 1907  
Month Avg Min Temperature   56.4   53.2   53.6   +2.8   61.0   in 2010   45.2   in 1945  
Month Average Temperature   64.6   63.2   62.2   +2.4   72.2   in 1925   50.6   in 1907  
HDD   0   0   2   -2   16   in 1945   0   in 2021  
Month HDD   6   19   17   -11   72   in 1907   0   in 1925  
Season HDD   5051   5111   5445   -394   6554   in 1905   4506   in 2012  
CDD   4   4   1   +3   14   in 1925   0   in    
Month CDD   4   10   5   -1   36   in 1925   0   in 2019  
Year CDD   21   18   16   +3   55   in 1991   0   in 2003  
Maximum Dew Point   69   68   60   +9   70   in 2010   41   in 1964  
Minimum Dew Point   59   59   50   +9   63   in 2010   32   in 1971  
Average  Dew Point   64   64   55   +9   67   in 2010   38   in 1964  
 Month Avg Max Dew Point   63.4   59.8   59.2   +4.2   67.6   in 2010   48.8   in 1976  
Month Avg Min Dew Point   53.6   49.4   49.0   +4.6   59.4   in 2010   39.4   in 1953  
Month Average Dew Point   58.5   54.6   54.0   +4.5   63.5   in 2010   45.1   in 1953  
Precipitation   .00   .13   .12   -.12   3.61   in 1920            
One Hour   .00   .04           1.41   in 2010            
Hourly Rate   .00   .31           6.78   in 2010            
Month Precipitation   .13   .13   .57   -.44   5.35   in 1982   .00   in 2005  
Year Precipitation   17.13   19.34   19.61   -2.48   36.73   in 1983   11.66   in 1905  
Snow   0.0   0.0   #####   #####   0.0   in              
Snow Depth   0   0           43987   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%   91%   +9%   100%   in 2021   54%   in 1977  
Minimum Humidity   63%   75%   60%   +3%   94%   in 2014   24%   in 1971  
Average Humidity   82%   86%   75%   +6%   97%   in 2014   46%   in 1965  
Maximum Barometer   29.92   29.95   30.01   -00.09   30.42   in 1976   29.61   in 2007  
Minimum Barometer   29.84   29.87   29.82   +00.02   30.23   in 1976   29.31   in 1988  
Average Barometer   29.88   29.91   29.91   -00.03   30.33   in 1976   29.48   in 1988  
Average Wind   6.0   6.9   6.2   -0.2   15.3   in 1988   1.9   in 1952  
Direction   WSW   SSW   SSW       WNW         S        
High Wind Gust   23   20   22   +1   52   in 1927   10   in 1952  
Direction   WSW   S   SSE       NW         SE        
High Heat Index   81   79   70   +11   86   in 1953            
Low Wind Chill                             39   in 1997  
Maximum Water Temp   62.4   54.7   61.0   +1.4   67.6   in 2010   54.7   in 2020  
Minimum Water Temp   58.1   51.4   57.5   +0.6   66.0   in 2010   51.4   in 2020  
Average Water Temp   60.3   53.1   59.3   +1.0   66.8   in 2010   53.1   in 2020  
Sunrise/ AM Twilight   5:11:52 AM   4:38:22 AM            
Sunset / PM Twilight   8:16:03 PM   8:49:34 PM            
Length Of Day   15:04:11                          
Special Conditions   Dense Fog                              
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