Portsmouth Rhode Island Weather Almanac  
Thursday, August 31, 2023  
Clear, Windy and Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    August 31, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   75   84   77   -2   93   in 1973   62   in 1903  
Minimum Temperature   58   63   62   -4   72   in 2005   41   in 1965  
Average Temperature   67   74   70   -3   82   in 1973   53   in 1965  
 Month Avg Max Temperature   78.0   83.3   78.6   -0.6   83.3   in 2022   73.0   in 1903  
Month Avg Min Temperature   63.6   66.9   63.7   -0.2   68.0   in 2018   57.6   in 1964  
Month Average Temperature   71.1   75.4   71.2   -0.1   75.4   in 2022   66.1   in 1964  
High Heat Index   74   87   79   -5   104   in 1973            
Low Wind Chill                             37   in 1965  
Heating Degree Days   0   0   1   -1   12   in 1965   0   in 2023  
Month Heating DD   0   0   3   -3   36   in 1905   0   in 2022  
Season Heating DD   0   0   3   -3   36   in 1905   0   in 2022  
Cooling Degree Days   2   9   5   -3   17   in 1973   0   in 2009  
Month Cooling DD   314   282   204   +110   316   in 2018   54   in 1964  
Year Cooling DD   702   672   532   +170   765   in 2020   244   in 1902  
Maximum Dew Point   61   75   66   -5   75   in 2022   49   in 1965  
Minimum Dew Point   49   57   57   -8   72   in 2005   33   in 1965  
Average  Dew Point   55   66   61   -6   73   in 2005   41   in 1965  
 Month Avg Max Dew Point   68.9   71.7   67.9   +1.0   72.5   in 2021   60.8   in 1964  
Month Avg Min Dew Point   59.4   63.5   59.6   -0.2   65.0   in 2018   50.8   in 1964  
Month Average Dew Point   64.2   67.6   63.7   +0.4   68.6   in 2018   55.8   in 1964  
Precipitation   .00   .91   .11   -.11   2.60   in 1954            
One Hour Rain   .00   .83           .83   in 2022            
Half Hour Rain   .00   .66           .66   in 2022            
Hourly Rain Rate   .00   10.67           10.67   in 2022            
Month Precipitation   5.37   2.01   3.63   +1.74   11.81   in 1985   .33   in 1993  
Year Precipitation   35.62   25.42   29.28   +6.34   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  
    August 31, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   87%   99%   93%   -6%   100%   in 2004   62%   in 1953  
Minimum Humidity   48%   56%   58%   -10%   90%   in 1950   31%   in 1968  
Average Humidity   68%   78%   76%   -8%   95%   in 1950   50%   in 1953  
Maximum Barometer   30.11   29.82   30.10   +00.01   30.54   in 2002   29.78   in 2021  
Minimum Barometer   29.91   29.71   29.89   +00.02   30.29   in 2002   28.65   in 1954  
Average Barometer   30.01   29.77   29.99   +00.02   30.42   in 2002   29.26   in 1954  
Average Wind   9.8   5.1   6.1   +3.7   27.5   in 1954   1.3   in 1990  
Direction   N   SSW   SSW       SW SW
High Wind Gust   24   25   22   +2   109   in 1954   11   in 1950  
Direction   #N/A   #N/A   SSW       ESE SE
Maximum Water Temp   69.3   74.8   71.0   -1.7   76.3   in 2021   66.9   in 2003  
Minimum Water Temp   68.4   73.2   68.7   -0.3   73.9   in 2021   #N/A   in 2020  
Average Water Temp   68.9   74.0   69.9   -1.0   75.1   in 2021   65.6   in 2003  
Sunrise/ AM Twilight   6:09:54 AM   5:09:04 AM            
Sunset / PM Twilight   7:20:09 PM   8:34:07 PM            
Length Of Day   13:10:15                          
Special Conditions   None                              
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