Portsmouth Rhode Island Weather Almanac  
Thursday, September 7, 2023  
Clear, Light Winds, Continued Very Hot, Very Muggy  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    September 7, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   90   70   75   +15   93   in 1983   63   in 1940  
Minimum Temperature   70   64   60   +10   71   in 1999   43   in 1962  
Average Temperature   80   67   67   +13   82   in 1983   57   in 2000  
 Month Avg Max Temperature   83.6   75.9   75.7   +7.9   85.6   in 1898   67.6   in 1994  
Month Avg Min Temperature   64.1   60.1   60.7   +3.4   70.4   in 1898   51.4   in 1893  
Month Average Temperature   74.0   68.1   68.1   +5.9   78.3   in 1898   61.0   in 1994  
High Heat Index   102   71   77   +25   102   in 2023            
Low Wind Chill                             42   in 1984  
Heating Degree Days   0   0   1   -1   8   in 2000   0   in 2023  
Month Heating DD   1   2   7   -6   32   in 1994   0   in 2021  
Season Heating DD   1   2   7   -6   48   in 1994   0   in 2020  
Cooling Degree Days   15   2   3   +12   17   in 1983   0   in 2019  
Month Cooling DD   64   24   27   +37   93   in 1898   0   in 1976  
Year Cooling DD   636   735   564   +72   812   in 2020   273   in 1902  
Maximum Dew Point   78   65   65   +13   78   in 2023   47   in 1984  
Minimum Dew Point   70   61   55   +15   70   in 2023   38   in 1984  
Average  Dew Point   74   63   60   +14   74   in 2023   43   in 1984  
 Month Avg Max Dew Point   72.0   64.6   65.3   +6.7   72.6   in 2014   53.3   in 1984  
Month Avg Min Dew Point   62.6   55.1   56.3   +6.3   64.9   in 1973   43.4   in 1984  
Month Average Dew Point   67.4   60.1   60.7   +6.7   68.6   in 1973   48.4   in 1984  
Precipitation   .00   .00   .12   -.12   1.36   in 1996            
One Hour Rain   .00   .00           .42   in 1974            
Half Hour Rain   .00   .00           .18   in 2008            
Hourly Rain Rate   .00   .00           1.99   in 2017            
Month Precipitation   .00   1.08   .78   -.78   6.53   in 2021   .00   in 2023  
Year Precipitation   35.62   26.50   30.06   +5.56   45.84   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 7, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   97%   92%   +7%   100%   in 2017   71%   in 1952  
Minimum Humidity   64%   81%   58%   +6%   94%   in 2011   30%   in 1980  
Average Humidity   82%   89%   75%   +6%   96%   in 2011   58%   in 1967  
Maximum Barometer   29.89   30.06   30.10   -00.21   30.45   in 1984   29.75   in 1951  
Minimum Barometer   29.74   29.95   29.90   -00.16   30.22   in 1984   29.39   in 2008  
Average Barometer   29.82   30.01   30.00   -00.19   30.34   in 1984   29.64   in 1979  
Average Wind   4.4   8.1   5.9   -1.5   13.3   in 2019   0.9   in 1989  
Direction   SSW   NE   SSW       N SSE
High Wind Gust   17   20   21   -4   48   in 1958   10   in 1992  
Direction   S   ENE   SSW       SW SSE
Maximum Water Temp   71.1   71.2   70.5   +0.6   74.3   in 2023   66.2   in 2017  
Minimum Water Temp   70.3   69.1   68.0   +2.3   71.7   in 2018   64.5   in 2017  
Average Water Temp   70.7   70.2   69.3   +1.4   72.9   in 2018   65.4   in 2017  
Sunrise/ AM Twilight   6:17:00 AM   5:49:55 AM            
Sunset / PM Twilight   7:08:27 PM   7:36:19 PM            
Length Of Day   12:51:27                          
Special Conditions   Fog                                  
Comments   Last 90+ day was on September 8, 2016  
Hour-by-Hour Weather For September 7, 2023            
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