Portsmouth Rhode Island Weather Almanac  
Monday, June 28, 2021  
Partly Cloudy to Clear PM, Hot and Very Muggy  
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    June 28, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   85   81   78   +7   90   in 1991   60   in 1938  
Minimum Temperature   68   63   62   +6   71   in 2010   49   in 1995  
Average Temperature   77   72   70   +7   79   in 2001   58   in 1938  
 Month Avg Max Temperature   76.8   77.0   73.5   +3.3   78.9   in 1943   66.3   in 1903  
Month Avg Min Temperature   59.5   58.6   57.5   +2.0   61.0   in 2001   52.6   in 1907  
Month Average Temperature   68.4   68.0   65.6   +2.8   69.1   in 2001   60.3   in 1903  
HDD   0   0   0   +0   7   in 1938   0   in 2021  
Month HDD   19   28   50   -31   159   in 1907   5   in 1899  
Season HDD   5064   5120   5478   -414   6620   in 1905   4549   in 2012  
CDD   12   7   5   +7   14   in 2001   0   in    
Month CDD   114   112   70   +44   146   in 1957   7   in 1972  
Year CDD   131   120   82   +11   164   in 2001   7   in 1972  
Maximum Dew Point   76   71   67   +9   76   in 2021   52   in 1981  
Minimum Dew Point   66   62   58   +8   70   in 2010   37   in 1980  
Average  Dew Point   71   67   62   +9   73   in 2010   47   in 1980  
 Month Avg Max Dew Point   65.9   64.4   62.6   +3.3   65.9   in 2021   54.1   in 1965  
Month Avg Min Dew Point   55.5   54.5   52.9   +2.6   57.4   in 2010   44.5   in 1958  
Month Average Dew Point   60.7   59.4   57.7   +3.0   61.7   in 2010   49.6   in 1965  
Precipitation   .00   T   .11   -.11   2.38   in 1938            
One Hour   .00   T           .58   in 1983            
Hourly Rate   .00   .00           4.24   in 2013            
Month Precipitation   2.05   1.81   3.31   -1.26   8.98   in 1982   .05   in 1949  
Year Precipitation   19.05   21.02   22.35   -3.30   39.12   in 1983   12.67   in 1957  
Snow   0.0   0.0   #####   #####   0.0   in              
Snow Depth   0   0           44010   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 28, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   96%   96%   92%   +4%   100%   in 2018   71%   in 2001  
Minimum Humidity   74%   64%   59%   +15%   92%   in 2013   28%   in 1981  
Average Humidity   85%   80%   75%   +10%   96%   in 2005   53%   in 1981  
Maximum Barometer   30.20   29.78   30.03   +00.17   30.34   in 1995   29.66   in 2010  
Minimum Barometer   30.15   29.71   29.83   +00.32   30.18   in 2014   29.38   in 1986  
Average Barometer   30.18   29.75   29.93   +00.25   30.26   in 1962   29.61   in 2009  
Average Wind   8.6   4.3   6.3   +2.3   12.3   in 1984   2.6   in 2008  
Direction   WSW   SW   SSW       S         SSE        
High Wind Gust   26   22   22   +4   46   in 1932   12   in 1952  
Direction   SW   SSE   SSW       NW         S        
High Heat Index   94   85   78   +16   94   in 2021            
Low Wind Chill                                      
Maximum Water Temp   70.5   64.9   67.8   +2.7   75.3   in 2007   63.6   in 2006  
Minimum Water Temp   66.7   60.4   63.5   +3.2   68.4   in 1999   59.2   in 2003  
Average Water Temp   68.6   62.7   65.7   +2.9   71.3   in 2007   61.9   in 2006  
Sunrise/ AM Twilight   5:14:18 AM   4:40:29 AM            
Sunset / PM Twilight   8:23:13 PM   8:57:03 PM            
Length Of Day   15:08:55                          
Special Conditions   None                              
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