Portsmouth Rhode Island Weather Almanac  
Thursday, September 14, 2023  
Mostly Cloudy early, Clear Day to P Cloudy PM, Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    September 14, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   78   77   73   +5   84   in 1916   58   in 1964  
Minimum Temperature   63   61   58   +5   69   in 1947   43   in 1963  
Average Temperature   71   69   65   +6   76   in 1903   52   in 1963  
 Month Avg Max Temperature   82.1   76.3   74.6   +7.6   83.4   in 1983   68.9   in 1917  
Month Avg Min Temperature   66.4   60.9   59.6   +6.8   67.0   in 1961   51.6   in 1893  
Month Average Temperature   74.6   68.8   67.1   +7.5   75.4   in 1961   62.2   in 1893  
High Heat Index   78   78   72   +6   88   in 1984            
Low Wind Chill                             39   in 1963  
Heating Degree Days   0   0   2   -2   13   in 1963   0   in 2023  
Month Heating DD   1   2   16   -15   57   in 1913   0   in 2015  
Season Heating DD   1   2   16   -15   94   in 1914   0   in 2015  
Cooling Degree Days   6   4   2   +4   11   in 1903   0   in 2019  
Month Cooling DD   135   55   45   +90   145   in 1961   1   in 1893  
Year Cooling DD   707   766   582   +125   837   in 2020   280   in 1902  
Maximum Dew Point   68   70   63   +5   74   in 1961   43   in 1975  
Minimum Dew Point   55   57   53   +2   67   in 2005   32   in 1959  
Average  Dew Point   62   64   58   +4   71   in 1961   38   in 1959  
 Month Avg Max Dew Point   73.5   66.3   64.5   +9.0   73.5   in 2023   54.6   in 1967  
Month Avg Min Dew Point   64.8   57.4   55.2   +9.6   64.8   in 2023   43.6   in 1967  
Month Average Dew Point   69.3   62.2   59.8   +9.5   69.3   in 2023   49.1   in 1967  
Precipitation   .00   .00   .13   -.13   2.62   in 1944            
One Hour Rain   .00   .00           .44   in 1956            
Half Hour Rain   .00   .00           .09   in 2008            
Hourly Rain Rate   .00   .00           .49   in 2008            
Month Precipitation   2.28   3.23   1.63   +.65   7.60   in 2021   T   in 2005  
Year Precipitation   37.90   28.65   30.91   +6.99   46.33   in 1998   17.43   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 14, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   99%   94%   +5%   100%   in 2005   73%   in 1953  
Minimum Humidity   56%   61%   62%   -6%   96%   in 2008   32%   in 1959  
Average Humidity   78%   80%   78%   -0%   97%   in 2008   55%   in 1959  
Maximum Barometer   30.05   29.96   30.12   -00.07   30.54   in 1985   29.63   in 1971  
Minimum Barometer   29.92   29.74   29.89   +00.03   30.29   in 2004   28.38   in 1944  
Average Barometer   29.99   29.85   30.00   -00.02   30.36   in 2004   29.50   in 1971  
Average Wind   6.3   6.2   6.4   -0.1   14.2   in 1979   1.5   in 2006  
Direction   NNW   WNW   SSW       S SE
High Wind Gust   17   24   22   -5   88   in 1944   12   in 2018  
Direction   NNW   NW   SSW       SE ENE
Maximum Water Temp   71.1   71.4   69.2   +1.9   72.3   in 2023   65.5   in 2006  
Minimum Water Temp   70.3   68.9   67.3   +3.0   71.1   in 2023   64.4   in 2006  
Average Water Temp   70.7   70.2   68.3   +2.4   71.7   in 2023   65.0   in 2006  
Sunrise/ AM Twilight   6:24:06 AM   5:57:16 AM            
Sunset / PM Twilight   6:56:28 PM   7:24:03 PM            
Length Of Day   12:32:22                          
Special Conditions   Fog                                  
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