Portsmouth Rhode Island Weather Almanac  
Sunday, June 20, 2021  
Mostly Cloudy, Light Rain Shower early then Clear and Continued Warm  
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    June 20, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   81   84   75   +6   92   in 1931   58   in 1958  
Minimum Temperature   64   64   59   +5   67   in 1949   46   in 1956  
Average Temperature   73   74   67   +6   79   in 1931   55   in 1905  
 Month Avg Max Temperature   76.8   75.0   72.3   +4.5   78.2   in 1925   64.9   in 1907  
Month Avg Min Temperature   58.5   56.4   56.2   +2.3   59.4   in 1899   49.9   in 1907  
Month Average Temperature   67.9   66.0   64.3   +3.6   68.8   in 1925   57.5   in 1907  
HDD   0   0   1   -1   10   in 1905   0   in 2021  
Month HDD   16   28   43   -27   159   in 1907   3   in 1899  
Season HDD   5061   5120   5471   -410   6615   in 1905   4549   in 2012  
CDD   8   9   3   +5   14   in 1931   0   in    
Month CDD   74   47   37   +37   92   in 1925   0   in 1965  
Year CDD   91   55   48   +36   101   in 2001   1   in 1948  
Maximum Dew Point   69   72   64   +5   74   in 1995   49   in 1970  
Minimum Dew Point   62   62   55   +7   63   in 2010   37   in 2014  
Average  Dew Point   66   67   59   +7   67   in 2020   45   in 1970  
 Month Avg Max Dew Point   64.7   61.9   61.4   +3.4   65.3   in 1996   53.2   in 1965  
Month Avg Min Dew Point   53.9   52.1   51.5   +2.4   55.0   in 2010   43.1   in 1958  
Month Average Dew Point   59.3   57.0   56.3   +3.0   60.0   in 1996   48.6   in 1965  
Precipitation   .01   .00   .12   -.11   1.48   in 1981            
One Hour   .01   .00           .51   in 1968            
Hourly Rate   .00   .00           2.04   in 2006            
Month Precipitation   1.52   1.16   2.37   -.85   8.90   in 1982   .01   in 1949  
Year Precipitation   18.52   20.37   21.41   -2.89   38.24   in 1998   12.67   in 1957  
Snow   0.0   0.0   #####   #####   0.0   in              
Snow Depth   0   0           44002   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 20, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   94%   95%   92%   +2%   100%   in 2019   54%   in 1954  
Minimum Humidity   55%   61%   58%   -3%   93%   in 2019   28%   in 2014  
Average Humidity   75%   78%   75%   -1%   97%   in 2019   43%   in 1954  
Maximum Barometer   29.84   30.08   30.01   -00.17   30.55   in 2002   29.67   in 1959  
Minimum Barometer   29.74   30.00   29.81   -00.07   30.45   in 2002   29.39   in 1985  
Average Barometer   29.79   30.04   29.91   -00.12   30.50   in 2002   29.62   in 1959  
Average Wind   5.6   6.5   5.9   -0.3   14.0   in 1967   1.6   in 1998  
Direction   SW   SW   SSW       NNE         SSE        
High Wind Gust   23   26   22   +1   39   in 1967   10   in 1998  
Direction   SW   SW   SW       NNE         ENE        
High Heat Index   83   89   76   +7   95   in 2012            
Low Wind Chill                             45   in 1956  
Maximum Water Temp   67.8   62.6   65.8   +2.0   70.3   in 2007   61.8   in 2003  
Minimum Water Temp   63.5   59.7   61.9   +1.6   67.2   in 2007   57.4   in 2003  
Average Water Temp   65.7   61.2   63.9   +1.8   68.8   in 2007   59.6   in 2003  
Sunrise/ AM Twilight   5:11:33 AM   4:37:34 AM            
Sunset / PM Twilight   8:22:36 PM   8:56:35 PM            
Length Of Day   15:11:03                          
Special Conditions   None                              
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