Portsmouth Rhode Island Weather Almanac
Monday, August 31, 2020
Clear early, Partly Cloudy Day to Mostly Cloudy PM, Light Winds and Cooler
Climate Normal Period Climate Record Period  
1981- 2010   1893 - 2020  
    August 31, 2020     Record Record
Observed Daily Data   Observed   2019   Normal   Depart   Highest Lowest
Maximum Temperature   77   84   76   +1   93   in 1973   62   in 1903  
Minimum Temperature   54   59   61   -7   72   in 2005   41   in 1965  
Average Temperature   66   72   68   -2   82   in 1973   53   in 1965  
Precipitation   .00   .00   .13   -.13   2.60   in 1954            
One Hour   .00   .00           .80   in 1954            
Snow   0.0   0.0   0.0   +0.0   0.0   in              
Snow Depth   0   0           0   in            
HDD   0   0   1   -1   12   in 1965   0   in 2020  
CDD   1   7   4   -3   17   in 1973   0   in 2009  
Maximum Dew Point   59   64   64   -5   75   in 2010   49   in 1965  
Minimum Dew Point   50   52   55   -5   72   in 2005   33   in 1965  
Average  Dew Point   55   58   60   -5   73   in 2005   41   in 1965  
Maximum Humidity   93%   89%   93%   -0%   100%   in 2004   62%   in 1953  
Minimum Humidity   43%   36%   58%   -15%   90%   in 1950   31%   in 1968  
Average Humidity   68%   63%   76%   -8%   95%   in 1950   50%   in 1953  
Maximum Barometer   30.17   30.29   30.11   +00.06   30.54   in 2002   29.81   in 1984  
Minimum Barometer   29.94   30.07   29.89   +00.05   30.29   in 2002   28.65   in 1954  
Average Barometer   30.06   30.18   30.00   +00.05   30.42   in 2002   29.26   in 1954  
Average Wind   3.3   3.9   6.2   -2.9   27.5   in 1954   1.3   in 1990  
Direction   S   NW   SSW       SW         SW        
High Wind Gust   17   18   22   -5   109   in 1954   11   in 1950  
Direction   #N/A   #N/A   SSW       ESE         SE        
High Heat Index   76   84   79   -3   104   in 1973            
Wind Chill                             #N/A   in #N/A  
Maximum Water Temp   69.4   70.9   70.7   -1.3   74.5   in 2010   66.9   in 2003  
Minimum Water Temp   63.5   68.6   68.3   -4.8   71.8   in 2018   63.5   in 2020  
Average Water Temp   66.5   69.8   69.5   -3.1   73.0   in 2018   65.6   in 2003  
Sunrise/ AM Twilight   6:11:16 AM   5:42:52 AM            
Sunset / PM Twilight   7:19:21 PM   7:47:44 PM            
Length Of Day   13:08:05                          
Special Conditions   None                                  
Comments      
    August 31, 2020     Record Record
Month-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
 Avg Maximum Temperature   82.7   80.7   78.3   +4.5   82.8   in 2016   73.0   in 1903  
Avg Minimum Temperature   66.3   63.8   63.4   +2.9   68.0   in 2018   57.6   in 1964  
Average Temperature   74.7   72.6   70.8   +3.9   75.3   in 2018   66.1   in 1964  
Total Precipitation   1.65   2.60   3.81   -2.16   11.81   in 1985   .33   in 1993  
Total Snow   0.0   0.0   0.0   +0.0   0.0   in     0.0   in    
Total HDD   0   3   6   -6   38   in 1905   0   in 2020  
Total CDD   302   238   194   +108   320   in 2018   61   in 1964  
Avg Maximum Dew Point   70.4   68.3   66.5   +3.9   72.2   in 2018   60.8   in 1964  
Avg Minimum Dew Point   61.5   58.8   58.4   +3.0   65.0   in 2018   50.8   in 1964  
Average  Dew Point   65.9   63.5   62.5   +3.5   68.6   in 2018   55.8   in 1964  
    August 31, 2020     Record Record
Year-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
Total Precipitation   24.03   37.83   31.62   -7.59   45.30   in 1998   16.54   in 1957  
Total Snow (since Jul 1 20)   0.0   0.0   0.0   +0.0   0.0   in     0.0   in    
Total HDD (since Jul 1 20)   0   3   9   -9   38   in 1905   0   in 2020  
Total CDD (since Jan 1)   766   658   498   +268   766   in 2020   253   in 1902  
                             
Hour-by-Hour Weather For August 31, 2020  
Climate Weather for August 31  
Weather History For August 31  
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