Portsmouth Rhode Island Weather Almanac  
Saturday, August 28, 2021  
Mostly Cloudy early, Partly Cloudy Day to Cloudy PM, Much Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    August 28, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   75   83   78   -3   95   in 1948   63   in 1987  
Minimum Temperature   63   65   62   +1   74   in 1948   49   in 1905  
Average Temperature   69   74   70   -1   85   in 1948   60   in 1908  
 Month Avg Max Temperature   81.6   83.2   78.8   +2.9   83.2   in 2020   73.3   in 1964  
Month Avg Min Temperature   67.1   67.0   63.9   +3.1   67.9   in 2018   56.7   in 1964  
Month Average Temperature   74.6   75.3   71.3   +3.3   75.3   in 2020   65.3   in 1964  
High Heat Index   76   85   80   -4   101   in 2018            
Low Wind Chill                             #N/A   in #N/A  
HDD   0   0   1   -1   5   in 1908   0   in    
Month HDD   0   0   1   -1   36   in 1905   0   in 2021  
Season HDD   9   0   4   +5   38   in 1914   0   in 2020  
CDD   4   9   6   -2   20   in 1948   0   in 1996  
Month CDD   270   289   193   +77   289   in 2020   36   in 1964  
Year CDD   660   753   521   +139   753   in 2020   239   in 1902  
Maximum Dew Point   70   69   66   +4   78   in 2018   48   in 1968  
Minimum Dew Point   56   62   58   -2   69   in 2018   38   in 1982  
Average  Dew Point   63   66   62   +1   74   in 2018   45   in 1968  
 Month Avg Max Dew Point   72.6   70.7   68.1   +4.5   72.6   in 2021   59.6   in 1964  
Month Avg Min Dew Point   64.3   62.1   59.9   +4.5   65.0   in 2018   49.4   in 1964  
Month Average Dew Point   68.5   66.4   64.0   +4.5   68.6   in 2018   54.5   in 1964  
Precipitation   .00   .00   .11   -.11   1.88   in 2006            
One Hour   .00   .00           1.21   in 2006            
Hourly Rate   .00   .00           5.14   in 2011            
Month Precipitation   6.03   1.57   3.30   +2.73   11.69   in 1946   .33   in 1993  
Year Precipitation   28.86   23.95   28.95   -.09   44.83   in 1998   16.49   in 1957  
Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A            
Snow Depth   #N/A   #N/A           #N/A   in              
Month Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in    
Season Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in #N/A  
    August 28, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   89%   97%   93%   -4%   100%   in 2013   71%   in 1968  
Minimum Humidity   63%   54%   59%   +4%   94%   in 1987   33%   in 1995  
Average Humidity   76%   76%   76%   +0%   97%   in 1987   55%   in 1968  
Maximum Barometer   30.30   29.82   30.07   +00.23   30.35   in 2002   29.73   in 2011  
Minimum Barometer   30.15   29.70   29.88   +00.27   30.23   in 2017   29.12   in 2011  
Average Barometer   30.23   29.76   29.97   +00.25   30.29   in 2002   29.43   in 2011  
Average Wind   6.8   4.0   6.1   +0.7   20.6   in 2011   1.7   in 1989  
Direction   ENE   NW   S       S         SSE        
High Wind Gust   19   18   21   -2   55   in 2011   12   in 2013  
Direction   SSE   SW   SW       SW         SW        
Maximum Water Temp   76.6   65.7   71.0   +5.6   76.6   in 2021   65.7   in 2020  
Minimum Water Temp   72.9   62.6   68.2   +4.7   72.9   in 2021   62.5   in 2003  
Average Water Temp   74.8   64.2   69.6   +5.1   74.8   in 2021   64.2   in 2020  
Sunrise/ AM Twilight   6:08:30 AM   5:39:56 AM            
Sunset / PM Twilight   7:23:48 PM   7:52:22 PM            
Length Of Day   13:15:18                          
Special Conditions   None                              
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