Portsmouth Rhode Island Weather Almanac
Thursday, September 3, 2020
Dense Fog early, Cloudy Day w/Light Drizzle then Partly Cloudy PM, Much Warmer and Muggy
Climate Normal Period Climate Record Period  
1981- 2010   1893 - 2020  
    September 3, 2020     Record Record
Observed Daily Data   Observed   2019   Normal   Depart   Highest Lowest
Maximum Temperature   81   80   75   +6   93   in 1929   65   in 1943  
Minimum Temperature   71   64   60   +11   72   in 1973   45   in 1893  
Average Temperature   76   72   68   +8   82   in 1929   57   in 1893  
Precipitation   T   .00   .13   .00   2.87   in 1972            
One Hour   T   .00           .52   in 2010            
Snow   #N/A   0.0   0.0   #N/A   0.0   in              
Snow Depth   #N/A   0           0   in            
HDD   0   0   1   -1   8   in 1893   0   in 2020  
CDD   11   7   4   +7   17   in 1929   0   in 2017  
Maximum Dew Point   74   68   63   +11   76   in 2010   48   in 1960  
Minimum Dew Point   64   61   54   +10   72   in 1959   39   in 1967  
Average  Dew Point   69   65   59   +10   74   in 1959   45   in 1960  
Maximum Humidity   99%   95%   93%   +6%   100%   in 2017   71%   in 1953  
Minimum Humidity   75%   55%   60%   +15%   95%   in 1986   33%   in 1960  
Average Humidity   87%   75%   76%   +11%   98%   in 1986   54%   in 1960  
Maximum Barometer   29.83   30.07   30.10   -00.27   30.48   in 1986   29.74   in 1957  
Minimum Barometer   29.73   29.95   29.88   -00.15   30.24   in 1994   29.32   in 2010  
Average Barometer   29.78   30.01   29.99   -00.21   30.30   in 1994   29.63   in 2010  
Average Wind   4.2   5.3   5.9   -1.7   17.9   in 1972   1.2   in 2009  
Direction   SW   SSE   SW       NNE         SE        
High Wind Gust   16   16   20   -4   48   in 1972   10   in 1976  
Direction   WNW   NNW   NNW       NNE         S        
High Heat Index   85   82   77   +8   101   in 1973            
Wind Chill                             #N/A   in #N/A  
Maximum Water Temp   69.1   70.4   70.4   -1.3   75.2   in 2010   65.8   in 2017  
Minimum Water Temp   67.6   68.7   68.0   -0.4   71.1   in 2018   64.1   in 2017  
Average Water Temp   68.4   69.6   69.2   -0.8   72.4   in 2018   65.0   in 2017  
Sunrise/ AM Twilight   6:14:49 AM   5:46:38 AM            
Sunset / PM Twilight   7:13:30 PM   7:41:41 PM            
Length Of Day   12:58:41                          
Special Conditions   Dense Fog                              
Comments      
    September 3, 2020     Record Record
Month-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
 Avg Maximum Temperature   76.7   77.3   75.7   +1.0   90.3   in 1929   66.3   in 2003  
Avg Minimum Temperature   64.3   59.7   60.7   +3.7   72.3   in 1959   50.0   in 2017  
Average Temperature   70.5   68.5   68.2   +2.3   80.0   in 1898   58.8   in 2017  
Total Precipitation   .31   .00   .37   -.06   2.97   in 1972   .00   in 2019  
Total Snow   0.0   0.0   0.0   +0.0   0.0   in     0.0   in    
Total HDD   0   0   3   -3   18   in 2017   0   in 2020  
Total CDD   17   11   12   +5   46   in 1898   0   in 2017  
Avg Maximum Dew Point   70.0   66.0   63.7   +6.3   74.3   in 1959   51.7   in 1970  
Avg Minimum Dew Point   60.0   57.0   54.7   +5.3   71.7   in 1959   39.7   in 1991  
Average  Dew Point   65.0   61.5   59.2   +5.8   73.0   in 1959   46.3   in 1970  
    September 3, 2020     Record Record
Year-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
Total Precipitation   24.34   37.83   32.01   -7.67   45.30   in 1998   16.55   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   0   12   -12   18   in 2017   0   in 2020  
Total CDD (since Jan 1)   783   669   510   +273   783   in 2020   267   in 1902  
                             
Hour-by-Hour Weather For September 3, 2020  
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