Portsmouth Rhode Island Weather Almanac  
Tuesday, September 5, 2023  
Mostly Cloudy/Dense Fog early then Partly Cloudy, Light Winds, Continued Hot, Very Muggy  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    September 5, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   88   77   75   +13   91   in 1961   59   in 1994  
Minimum Temperature   68   62   60   +8   72   in 1953   47   in 1906  
Average Temperature   78   70   68   +10   80   in 1961   56   in 1994  
 Month Avg Max Temperature   81.4   79.0   76.0   +5.4   86.6   in 1898   66.6   in 1994  
Month Avg Min Temperature   61.6   59.4   61.0   +0.6   70.6   in 1959   51.4   in 1893  
Month Average Temperature   71.6   69.4   68.4   +3.2   78.8   in 1898   60.8   in 1994  
High Heat Index   99   79   77   +22   102   in 1961            
Low Wind Chill                             44   in 2000  
Heating Degree Days   0   0   1   -1   9   in 1994   0   in 2023  
Month Heating DD   1   0   5   -4   25   in 1994   0   in 2022  
Season Heating DD   1   0   5   -4   42   in 1905   0   in 2022  
Cooling Degree Days   13   5   4   +9   15   in 1961   0   in 2019  
Month Cooling DD   34   22   21   +13   69   in 1898   0   in 1986  
Year Cooling DD   606   733   558   +48   800   in 2020   272   in 1902  
Maximum Dew Point   78   70   65   +13   78   in 2023   50   in 1965  
Minimum Dew Point   68   61   56   +12   69   in 1953   35   in 2000  
Average  Dew Point   73   66   61   +12   73   in 2023   43   in 2000  
 Month Avg Max Dew Point   69.4   64.4   65.4   +4.0   73.4   in 1973   54.4   in 1987  
Month Avg Min Dew Point   59.6   53.2   56.6   +3.0   67.6   in 1959   44.4   in 1967  
Month Average Dew Point   64.6   59.2   61.0   +3.6   70.3   in 1973   49.6   in 1987  
Precipitation   .00   .67   .11   -.11   2.84   in 1991            
One Hour Rain   .00   .30           .67   in 1991            
Half Hour Rain   .00   .00           .15   in 2022            
Hourly Rain Rate   .00   1.10           2.09   in 2012            
Month Precipitation   .00   .67   .55   -.55   6.52   in 2021   .00   in 2023  
Year Precipitation   35.62   26.09   29.83   +5.79   45.30   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 5, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   99%   92%   +7%   100%   in 2003   78%   in 1998  
Minimum Humidity   70%   81%   57%   +13%   92%   in 1991   32%   in 2007  
Average Humidity   85%   90%   75%   +10%   96%   in 1991   56%   in 2020  
Maximum Barometer   29.92   30.14   30.11   -00.19   30.57   in 1989   29.66   in 1988  
Minimum Barometer   29.87   30.09   29.92   -00.05   30.28   in 2004   29.15   in 1988  
Average Barometer   29.90   30.12   30.01   -00.12   30.39   in 1989   29.41   in 1988  
Average Wind   2.3   3.9   5.8   -3.5   13.5   in 2016   1.6   in 2006  
Direction   NW   SSE   SSW       NNE SSW
High Wind Gust   16   16   20   -4   41   in 2016   11   in 1952  
Direction   NE   S   SW       NNE SW
Maximum Water Temp   72.9   72.0   70.5   +2.4   73.8   in 2018   66.9   in 1997  
Minimum Water Temp   71.4   70.2   67.9   +3.5   71.5   in 2018   64.7   in 2017  
Average Water Temp   72.2   71.1   69.2   +2.9   72.7   in 2018   65.9   in 2017  
Sunrise/ AM Twilight   6:14:59 AM   5:47:48 AM            
Sunset / PM Twilight   7:11:50 PM   7:39:48 PM            
Length Of Day   12:56:51                          
Special Conditions   Dense Fog                              
Comments   Record Breaking High Dew Points  
Hour-by-Hour Weather For September 5, 2023            
Climate Weather for September 5            
Weather History For September 5            
Weather Calendar            
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