Portsmouth Rhode Island Weather Almanac  
Saturday, September 2, 2023  
Clear to Partly Cloudy PM, Continued Cool  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    September 2, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   73   77   76   -3   93   in 1953   63   in 2003  
Minimum Temperature   56   55   61   -5   72   in 1959   46   in 1991  
Average Temperature   65   66   69   -4   81   in 1953   57   in 2017  
 Month Avg Max Temperature   73.5   79.5   76.5   -3.0   90.5   in 1953   64.5   in 1912  
Month Avg Min Temperature   55.0   59.0   61.5   -6.5   72.5   in 1959   48.0   in 1991  
Month Average Temperature   64.5   69.5   69.0   -4.5   80.5   in 1898   58.0   in 1912  
High Heat Index   73   77   77   -4   97   in 1953            
Low Wind Chill                             43   in 1991  
Heating Degree Days   0   0   1   -1   8   in 2017   0   in 2023  
Month Heating DD   1   0   2   -1   14   in 1912   0   in 2022  
Season Heating DD   1   0   2   -1   42   in 1905   0   in 2022  
Cooling Degree Days   0   1   4   -4   16   in 1953   0   in 2023  
Month Cooling DD   0   9   10   -10   31   in 1898   0   in 2023  
Year Cooling DD   572   720   547   +25   772   in 2020   266   in 1902  
Maximum Dew Point   62   60   66   -4   77   in 2014   47   in 1970  
Minimum Dew Point   54   48   57   -3   71   in 1959   35   in 1991  
Average  Dew Point   58   54   61   -3   74   in 2014   43   in 1967  
 Month Avg Max Dew Point   60.5   60.5   66.0   -5.5   76.0   in 2014   46.0   in 1970  
Month Avg Min Dew Point   51.5   49.0   57.0   -5.5   71.5   in 1959   34.5   in 1991  
Month Average Dew Point   56.0   55.0   61.0   -5.0   73.5   in 2014   42.0   in 1991  
Precipitation   .00   .00   .11   -.11   5.21   in 2021            
One Hour Rain   .00   .00           1.56   in 2021            
Half Hour Rain   .00   .00           .88   in 2021            
Hourly Rain Rate   .00   .00           8.00   in 2021            
Month Precipitation   .00   .00   .22   -.22   6.45   in 2021   .00   in 2023  
Year Precipitation   35.62   25.42   29.50   +6.12   45.30   in 1998   16.54   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 2, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   95%   96%   93%   +2%   100%   in 2021   75%   in 1984  
Minimum Humidity   62%   53%   59%   +3%   93%   in 1976   30%   in 1960  
Average Humidity   79%   75%   76%   +3%   97%   in 1976   55%   in 1970  
Maximum Barometer   30.26   30.30   30.11   +00.15   30.55   in 1991   29.74   in 1952  
Minimum Barometer   30.03   30.06   29.90   +00.13   30.23   in 2009   29.49   in 2021  
Average Barometer   30.15   30.18   30.01   +00.14   30.37   in 1991   29.67   in 1952  
Average Wind   5.5   4.6   6.2   -0.7   16.1   in 1996   1.6   in 1955  
Direction   SSW   NE   SW       N NE
High Wind Gust   26   16   21   +5   46   in 1996   10   in 1955  
Direction   SSW   NE   SW       N NE
Maximum Water Temp   72.9   74.1   70.8   +2.1   76.6   in 2002   65.5   in 2003  
Minimum Water Temp   71.2   69.8   68.3   +2.9   74.1   in 2010   64.9   in 2003  
Average Water Temp   72.1   72.0   69.6   +2.5   75.2   in 2010   65.2   in 2003  
Sunrise/ AM Twilight   6:11:56 AM   5:44:36 AM            
Sunset / PM Twilight   7:16:51 PM   7:44:59 PM            
Length Of Day   13:04:55                          
Special Conditions   None                                  
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