Portsmouth Rhode Island Weather Almanac  
Sunday, August 1, 2021  
Clear early, Partly Cloudy Day to Cloudy PM, Light Winds and Continued Cool  
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    August 1, 2021   Record   Record  
Observed Daily Data   2021   2021   Norm   Depart   Highest   Lowest  
Maximum Temperature   77   88   80   -3   91   in 1975   65   in 1905  
Minimum Temperature   56   66   65   -9   74   in 1999   54   in 1965  
Average Temperature   67   77   72   -5   82   in 1975   62   in 1905  
 Month Avg Max Temperature   77.0   88.0   80.0   -3.0   91.0   in 1975   65.0   in 1905  
Month Avg Min Temperature   56.0   66.0   65.0   -9.0   74.0   in 1999   54.0   in 1965  
Month Average Temperature   67.0   77.0   72.0   -5.0   82.0   in 1975   62.0   in 1905  
HDD   0   0   0   +0   3   in 1905   0   in    
Month HDD   0   0   0   +0   3   in 1905   0   in 2021  
Season HDD   9   0   3   +6   34   in 1914   0   in 2020  
CDD   2   12   8   -6   17   in 1975   0   in 1996  
Month CDD   2   12   8   -6   17   in 1975   0   in 1996  
Year CDD   392   476   336   +56   476   in 2020   135   in 1902  
Maximum Dew Point   63   73   69   -6   79   in 1975   57   in 1964  
Minimum Dew Point   53   63   62   -9   71   in 1979   40   in 1964  
Average  Dew Point   58   68   65   -7   74   in 1975   49   in 1964  
 Month Avg Max Dew Point   63.0   73.0   69.0   -6.0   79.0   in 1975   57.0   in 1964  
Month Avg Min Dew Point   53.0   63.0   62.0   -9.0   71.0   in 1979   40.0   in 1964  
Month Average Dew Point   58.0   68.0   65.0   -7.0   73.5   in 1975   48.5   in 1964  
Precipitation   .00   .00   .11   -.11   1.98   in 1927            
One Hour   .00   .00           .70   in 1950            
Hourly Rate   .00   .00           .70   in 2016            
Month Precipitation   .00   .00   .11   -.11   1.98   in 1927   .00   in 2021  
Year Precipitation   22.83   22.38   25.76   -2.93   41.55   in 1998   14.33   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 1, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   93%   96%   93%   -0%   100%   in 2017   73%   in 1953  
Minimum Humidity   53%   46%   58%   -5%   95%   in 1996   31%   in 1987  
Average Humidity   73%   71%   76%   -3%   98%   in 1996   55%   in 1964  
Maximum Barometer   29.96   30.01   30.04   -00.08   30.37   in 2001   29.71   in 2008  
Minimum Barometer   29.85   29.84   29.85   -00.00   30.25   in 2001   29.44   in 1976  
Average Barometer   29.91   29.93   29.94   -00.04   30.31   in 2001   29.64   in 1976  
Average Wind   3.5   4.3   5.6   -2.1   10.1   in 1984   2.2   in 1996  
Direction   S   NNW   SSW       WSW         NNW        
High Wind Gust   16   25   21   -5   38   in 1985   11   in 2002  
Direction   SSE   WSW   SW       N         S        
High Heat Index   78   95   83   -5   102   in 1975            
Low Wind Chill                             #N/A   in #N/A  
Maximum Water Temp   73.5   69.3   72.0   +1.5   77.0   in 2006   65.8   in 1996  
Minimum Water Temp   71.3   64.2   68.6   +2.7   73.1   in 2013   64.2   in 2020  
Average Water Temp   72.4   66.8   70.3   +2.1   73.7   in 2013   65.5   in 1996  
Sunrise/ AM Twilight   5:41:09 AM   5:10:10 AM            
Sunset / PM Twilight   8:01:53 PM   8:32:53 PM            
Length Of Day   14:20:44                          
Special Conditions   None                              
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Hour-by-Hour Weather For August 1, 2021            
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