Portsmouth Rhode Island Weather Almanac  
Sunday, September 3, 2023  
Partly Cloudy early then Clear, Light Winds, Much Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    September 3, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   84   78   76   +8   93   in 1929   65   in 1943  
Minimum Temperature   64   56   61   +3   72   in 1973   45   in 1893  
Average Temperature   74   67   68   +6   82   in 1929   57   in 1893  
 Month Avg Max Temperature   77.0   79.0   76.3   +0.7   90.3   in 1929   66.3   in 2003  
Month Avg Min Temperature   58.0   58.0   61.3   -3.3   72.3   in 1959   50.0   in 2017  
Month Average Temperature   67.7   68.7   68.7   -1.0   80.3   in 1898   59.0   in 2017  
High Heat Index   89   78   77   +12   101   in 1973            
Low Wind Chill                             42   in 1893  
Heating Degree Days   0   0   1   -1   8   in 1893   0   in 2023  
Month Heating DD   1   0   3   -2   18   in 2017   0   in 2022  
Season Heating DD   1   0   3   -2   42   in 1905   0   in 2022  
Cooling Degree Days   9   2   4   +5   17   in 1929   0   in 2017  
Month Cooling DD   9   11   14   -5   46   in 1898   0   in 2017  
Year Cooling DD   581   722   551   +30   783   in 2020   267   in 1902  
Maximum Dew Point   73   61   65   +8   76   in 2010   48   in 1960  
Minimum Dew Point   62   52   57   +5   72   in 1959   39   in 1967  
Average  Dew Point   68   57   61   +7   74   in 1959   45   in 1960  
 Month Avg Max Dew Point   64.7   60.7   65.7   -1.0   74.3   in 1959   51.7   in 1970  
Month Avg Min Dew Point   55.0   50.0   57.0   -2.0   71.7   in 1959   39.7   in 1991  
Month Average Dew Point   60.0   55.7   61.0   -1.0   73.0   in 1959   46.3   in 1970  
Precipitation   .00   .00   .11   -.11   2.87   in 1972            
One Hour Rain   .00   .00           .52   in 2010            
Half Hour Rain   .00   .00           .35   in 2010            
Hourly Rain Rate   .00   .00           5.24   in 2010            
Month Precipitation   .00   .00   .33   -.33   6.45   in 2021   .00   in 2023  
Year Precipitation   35.62   25.42   29.61   +6.01   45.30   in 1998   16.55   in 1957  
Snow                                      
Snow Depth                                      
Month Snow                                      
Season Snow   0.0   0.0   0.0   +0.0   0.0   in 1996   0.0   in 1998  
    September 3, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   98%   98%   93%   +5%   100%   in 2017   71%   in 1953  
Minimum Humidity   62%   42%   60%   +2%   95%   in 1986   33%   in 1960  
Average Humidity   80%   70%   76%   +4%   98%   in 1986   54%   in 1960  
Maximum Barometer   30.03   30.33   30.09   -00.06   30.48   in 1986   29.74   in 1957  
Minimum Barometer   29.84   30.19   29.89   -00.05   30.24   in 1994   29.32   in 2010  
Average Barometer   29.94   30.26   29.99   -00.05   30.30   in 1994   29.63   in 2010  
Average Wind   4.4   2.7   5.8   -1.4   17.9   in 1972   1.2   in 2009  
Direction   W   S   SW       NNE SE
High Wind Gust   19   14   20   -1   48   in 1972   10   in 1976  
Direction   SW   S   NNW       NNE S
Maximum Water Temp   73.6   71.6   70.5   +3.1   75.2   in 2010   65.8   in 2017  
Minimum Water Temp   71.6   70.9   68.2   +3.4   71.6   in 2022   64.1   in 2017  
Average Water Temp   72.6   71.3   69.4   +3.2   72.6   in 2022   65.0   in 2017  
Sunrise/ AM Twilight   6:12:57 AM   5:45:40 AM            
Sunset / PM Twilight   7:15:11 PM   7:43:15 PM            
Length Of Day   13:02:14                          
Special Conditions   None                                  
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