Portsmouth Rhode Island Weather Almanac  
Friday, August 6, 2021  
Partly Cloudy, Light Fog early then Clear PM, Warmer  
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    August 6, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   82   84   79   +3   95   in 1918   66   in 1936  
Minimum Temperature   64   67   65   -1   73   in 1980   52   in 1972  
Average Temperature   73   76   72   +1   82   in 1918   61   in 1994  
 Month Avg Max Temperature   76.2   85.5   79.8   -3.7   88.5   in 1975   70.3   in 1903  
Month Avg Min Temperature   60.8   69.5   65.0   -4.2   71.7   in 1979   55.5   in 1964  
Month Average Temperature   68.8   77.7   72.0   -3.2   79.8   in 1975   64.3   in 1964  
HDD   0   0   0   +0   4   in 1994   0   in    
Month HDD   0   0   0   +0   11   in 1903   0   in 2021  
Season HDD   9   0   3   +6   34   in 1914   0   in 2020  
CDD   8   11   8   +0   17   in 1918   0   in 2004  
Month CDD   23   76   48   -25   89   in 1975   5   in 1964  
Year CDD   413   540   376   +37   540   in 2020   176   in 1902  
Maximum Dew Point   72   66   69   +3   76   in 2018   52   in 1951  
Minimum Dew Point   62   55   61   +1   71   in 1980   43   in 1957  
Average  Dew Point   67   61   65   +2   73   in 1988   49   in 1951  
 Month Avg Max Dew Point   67.0   73.8   69.0   -2.0   74.7   in 2018   57.2   in 1964  
Month Avg Min Dew Point   58.5   64.3   61.5   -3.0   69.3   in 1988   48.2   in 1964  
Month Average Dew Point   62.8   69.1   65.0   -2.3   71.7   in 2018   52.7   in 1964  
Precipitation   .00   .00   .12   -.12   2.39   in 1952            
One Hour   .00   .00           1.56   in 1952            
Hourly Rate   .00   .00           .81   in 2007            
Month Precipitation   3.61   .12   .71   +2.90   3.98   in 1952   .00   in 1999  
Year Precipitation   26.44   22.50   26.36   +.08   41.55   in 1998   14.69   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 6, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   97%   94%   92%   +5%   100%   in 2003   73%   in 1951  
Minimum Humidity   64%   61%   57%   +7%   92%   in 1952   35%   in 1957  
Average Humidity   81%   78%   75%   +6%   96%   in 1952   55%   in 1957  
Maximum Barometer   30.17   30.13   30.05   +00.12   30.37   in 1992   29.68   in 1954  
Minimum Barometer   30.11   30.04   29.86   +00.25   30.26   in 1996   29.38   in 1989  
Average Barometer   30.14   30.09   29.96   +00.18   30.31   in 1996   29.58   in 1954  
Average Wind   5.3   3.0   5.7   -0.4   12.4   in 2002   2.3   in 1997  
Direction   SW   NNW   SW       NNW         NNW        
High Wind Gust   17   14   20   -3   31   in 1902   11   in 2019  
Direction   SW   S   SW       S         E        
High Heat Index   84   84   80   +4   99   in 2018            
Low Wind Chill                             #N/A   in #N/A  
Maximum Water Temp   72.7   68.2   72.1   +0.6   75.4   in 2018   67.0   in 2004  
Minimum Water Temp   69.2   66.0   68.6   +0.6   71.8   in 1999   65.1   in 2001  
Average Water Temp   71.0   67.1   70.4   +0.6   73.0   in 2019   66.3   in 2004  
Sunrise/ AM Twilight   5:46:09 AM   5:15:40 AM            
Sunset / PM Twilight   7:55:54 PM   8:26:23 PM            
Length Of Day   14:09:45                          
Special Conditions   Fog                                  
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