Portsmouth Rhode Island Weather Almanac  
Saturday, September 9, 2023  
Cloudy early, P Cloudy Day to Mostly Cloudy PM, Foggy,  Very Warm and Continued Very Muggy  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    September 9, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   84   78   74   +10   91   in 2016   62   in 1919  
Minimum Temperature   73   58   59   +14   73   in 2023   45   in 1952  
Average Temperature   79   68   67   +12   81   in 2016   56   in 1938  
 Month Avg Max Temperature   83.4   75.9   75.3   +8.1   84.7   in 1983   69.0   in 1994  
Month Avg Min Temperature   66.0   59.8   60.3   +5.7   68.0   in 1898   51.4   in 1893  
Month Average Temperature   74.9   68.0   67.9   +7.0   75.7   in 1959   62.1   in 1994  
High Heat Index   96   80   76   +20   100   in 2016            
Low Wind Chill                             43   in 1952  
Heating Degree Days   0   0   1   -1   9   in 1938   0   in 2023  
Month Heating DD   1   2   9   -8   33   in 1994   0   in 2021  
Season Heating DD   1   2   9   -8   54   in 1914   0   in 2020  
Cooling Degree Days   14   3   3   +11   16   in 2016   0   in 2018  
Month Cooling DD   90   29   33   +57   96   in 1959   0   in 1893  
Year Cooling DD   662   740   570   +92   826   in 2020   279   in 1902  
Maximum Dew Point   78   65   64   +14   78   in 2023   46   in 1956  
Minimum Dew Point   73   58   55   +18   73   in 2023   36   in 1980  
Average  Dew Point   76   62   59   +17   76   in 2023   44   in 1956  
 Month Avg Max Dew Point   73.4   64.6   65.0   +8.4   73.4   in 2023   52.9   in 1984  
Month Avg Min Dew Point   64.7   55.7   56.0   +8.7   64.7   in 2023   43.6   in 1984  
Month Average Dew Point   69.2   60.4   60.4   +8.8   69.2   in 2023   48.2   in 1984  
Precipitation   .00   .00   .12   -.12   2.59   in 1969            
One Hour Rain   .00   .00           .47   in 1969            
Half Hour Rain   .00   .00           .25   in 2008            
Hourly Rain Rate   .00   .00           3.03   in 2008            
Month Precipitation   .00   1.08   1.02   -1.02   7.57   in 2021   .00   in 2023  
Year Precipitation   35.62   26.50   30.30   +5.32   46.33   in 1998   16.94   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 9, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   99%   93%   +6%   100%   in 2005   69%   in 1980  
Minimum Humidity   83%   62%   59%   +24%   90%   in 1999   29%   in 1957  
Average Humidity   91%   81%   76%   +15%   95%   in 1999   52%   in 1980  
Maximum Barometer   30.13   30.14   30.12   +00.01   30.44   in 1986   29.72   in 2010  
Minimum Barometer   30.04   29.95   29.93   +00.11   30.23   in 2020   29.41   in 1987  
Average Barometer   30.09   30.05   30.03   +00.06   30.32   in 1952   29.62   in 1969  
Average Wind   5.3   5.0   5.5   -0.2   10.8   in 1969   2.3   in 1961  
Direction   S   NNE   SSW       NNE SSW
High Wind Gust   14   16   20   -6   45   in 1949   11   in 2020  
Direction   SSE   ENE   SSW       NW SSE
Maximum Water Temp   71.8   71.1   70.2   +1.6   74.8   in 2023   65.7   in 1997  
Minimum Water Temp   70.2   69.1   67.9   +2.3   72.9   in 2023   63.9   in 2004  
Average Water Temp   71.0   70.1   69.1   +1.9   73.9   in 2023   65.0   in 2017  
Sunrise/ AM Twilight   6:19:02 AM   5:52:01 AM            
Sunset / PM Twilight   7:05:03 PM   7:32:49 PM            
Length Of Day   12:46:01                          
Special Conditions   Fog                                  
Comments   Record High Dew Points  
Hour-by-Hour Weather For September 9, 2023            
Climate Weather for September 9            
Weather History For September 9            
Weather Calendar            
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