Portsmouth Rhode Island Weather Almanac  
Sunday, August 22, 2021  
Cloudy, Heavy Rain & Windy, Cooler, TS Henri made landfall on Block Island & Westerly RI @ 1215pm  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    August 22, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   75   87   78   -3   90   in 1976   66   in 1999  
Minimum Temperature   69   68   63   +6   74   in 2009   47   in 1982  
Average Temperature   72   78   71   +1   80   in 2019   58   in 1982  
 Month Avg Max Temperature   80.7   83.1   79.0   +1.7   84.1   in 1937   72.7   in 1964  
Month Avg Min Temperature   66.5   67.3   64.2   +2.3   69.4   in 2018   56.2   in 1964  
Month Average Temperature   73.9   75.5   71.6   +2.2   76.4   in 1937   64.8   in 1964  
High Heat Index   78   93   79   -1   103   in 1976            
Low Wind Chill                             #N/A   in #N/A  
HDD   0   0   0   +0   7   in 1982   0   in    
Month HDD   0   0   0   +0   26   in 1964   0   in 2021  
Season HDD   9   0   3   +6   34   in 1914   0   in 2020  
CDD   7   13   6   +1   15   in 2019   0   in 2007  
Month CDD   195   230   157   +38   251   in 1937   21   in 1964  
Year CDD   585   694   485   +100   694   in 2020   214   in 1902  
Maximum Dew Point   74   73   67   +7   78   in 1976   45   in 1988  
Minimum Dew Point   68   65   59   +9   72   in 2009   36   in 1982  
Average  Dew Point   71   69   63   +8   74   in 2019   41   in 1988  
 Month Avg Max Dew Point   71.6   71.0   68.5   +3.1   73.2   in 2018   58.5   in 1964  
Month Avg Min Dew Point   63.6   63.3   60.3   +3.3   66.9   in 2003   47.8   in 1964  
Month Average Dew Point   67.6   67.2   64.4   +3.3   70.0   in 2018   53.1   in 1964  
Precipitation   1.00   .34   .12   +.88   2.21   in 1908            
One Hour   .33   .34           .87   in 1977            
Hourly Rate   1.52   2.70           5.94   in 2019            
Month Precipitation   5.21   1.40   2.63   +2.58   9.62   in 1946   .16   in 1993  
Year Precipitation   28.04   23.78   28.28   -.24   43.94   in 1983   15.70   in 1957  
Snow   0.0   0.0   #N/A   #N/A   #N/A   in #N/A            
Snow Depth   0   0           #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 22, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   99%   94%   94%   +5%   100%   in 2018   67%   in 1982  
Minimum Humidity   94%   50%   58%   +36%   94%   in 2021   34%   in 2005  
Average Humidity   97%   72%   76%   +21%   97%   in 2021   54%   in 1982  
Maximum Barometer   29.90   29.98   30.07   -00.17   30.49   in 1957   29.78   in 1994  
Minimum Barometer   29.54   29.89   29.87   -00.33   30.30   in 1957   29.54   in 2021  
Average Barometer   29.72   29.94   29.97   -00.25   30.40   in 1957   29.70   in 1971  
Average Wind   13.3   4.5   5.6   +7.7   13.3   in 2021   2.0   in 1976  
Direction   S   SW   SSW       S         SSE        
High Wind Gust   42   25   20   +22   42   in 2021   11   in 1976  
Direction   E   NE   SW       E         S        
Maximum Water Temp   72.9   66.7   71.2   +1.7   76.6   in 2003   66.7   in 2020  
Minimum Water Temp   71.2   64.2   68.5   +2.7   72.4   in 2015   64.2   in 2020  
Average Water Temp   72.1   65.5   69.9   +2.2   73.5   in 2015   65.5   in 2020  
Sunrise/ AM Twilight   6:02:25 AM   5:33:24 AM            
Sunset / PM Twilight   7:33:18 PM   8:02:18 PM            
Length Of Day   13:30:53                          
Special Conditions   Fog                                  
Comments   TS Henri makes landfall @ Block Island & Westerly RI        
Hour-by-Hour Weather For August 22, 2021            
Climate Weather for August 22            
Weather History For August 22            
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