Portsmouth Rhode Island Weather Almanac  
Sunday, September 8, 2024  
Clear, Breezy and Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    September 8, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   69   82   74   -5   88   in 1945   62   in 1932  
Minimum Temperature   55   72   59   -4   72   in 2023   46   in 1952  
Average Temperature   62   77   67   -5   79   in 2015   56   in 1952  
 Month Avg Max Temperature   75.6   83.4   75.5   +0.1   85.0   in 1983   68.3   in 1994  
Month Avg Min Temperature   57.8   65.1   60.5   -2.8   69.3   in 1898   51.4   in 1893  
Month Average Temperature   66.9   74.4   68.0   -1.1   76.8   in 1898   61.4   in 1994  
High Heat Index   68   92   75   -7   93   in 2015            
Low Wind Chill                             43   in 1952  
Heating Degree Days   3   0   1   +2   9   in 1952   0   in 2023  
Month Heating DD   5   1   8   -3   33   in 1994   0   in 2021  
Season Heating DD   7   1   15   -8   49   in 1994   0   in 2021    
Cooling Degree Days   0   12   3   -3   14   in 2015   0   in 2024    
Month Cooling DD   20   76   30   -10   94   in 1898   0   in 1893    
Year Cooling DD   666   648   567   +99   819   in 2020   276   in 1902    
Maximum Dew Point   56   79   64   -8   79   in 2023   48   in 1980    
Minimum Dew Point   47   71   55   -8   71   in 2023   37   in 1955    
Average  Dew Point   52   75   60   -8   75   in 2023   44   in 1980  
 Month Avg Max Dew Point   63.3   72.9   65.1   -1.9   72.9   in 2023   52.9   in 1984  
Month Avg Min Dew Point   53.0   63.6   56.1   -3.1   64.3   in 1959   43.6   in 1984  
Month Average Dew Point   58.4   68.4   60.6   -2.3   68.4   in 2023   48.3   in 1984  
Precipitation   .00   .00   .12   -.12   1.84   in 2011            
One Hour Rain   .00   .00           .69   in 2011            
Half Hour Rain   .00   .00           .67   in 2011            
Hourly Rain Rate   .00   .00           5.94   in 2011            
Month Precipitation   .16   .00   .90   -.74   6.53   in 2021   .00   in 2015  
Year Precipitation   40.85   35.62   30.31   +10.54   46.33   in 1998   16.94   in 1957  
Snow   0.0   0.0   0.0   +0.0   0.0   in 1900            
Snow Depth   0   0   0   +0   0   in              
Month Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in Many  
Season Snow                                      
    September 8, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   93%   99%   92%   +1%   100%   in 2006   60%   in 1983  
Minimum Humidity   50%   88%   59%   -9%   96%   in 1993   30%   in 1980  
Average Humidity   72%   94%   76%   -4%   98%   in 1993   48%   in 1983  
Maximum Barometer   30.02   30.06   30.12   -00.10   30.54   in 1984   29.59   in 1998  
Minimum Barometer   29.82   29.88   29.93   -00.11   30.27   in 1984   29.47   in 1998  
Average Barometer   29.92   29.97   30.02   -00.10   30.41   in 1984   29.53   in 1998  
Average Wind   8.5   6.7   5.6   +2.9   10.2   in 1981   1.0   in 1989  
Direction   WNW   SSW   S       S         SW        
High Wind Gust   24   19   20   +4   47   in 1932   11   in 2009  
Direction   W   S   S       N         WNW        
Maximum Water Temp   68.2   74.1   70.3   -2.1   74.3   in 2015   66.2   in 2017  
Minimum Water Temp   67.1   72.3   68.1   -1.0   72.3   in 2023   64.3   in 2017  
Average Water Temp   67.7   73.2   69.2   -1.6   73.2   in 2023   65.3   in 2017  
Sunrise/ AM Twilight   6:18:47 AM   5:50:58 AM            
Sunset / PM Twilight   7:05:28 PM   7:34:34 PM            
Length Of Day   12:46:41                          
Special Conditions   None                                  
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