Portsmouth Rhode Island Weather Almanac  
Wednesday, October 4, 2023  
Clear to Dense Fog Late, Very Light Winds, Record Tying Heat  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    October 4, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   83   56   66   +17   83   in 2023   51   in 1996  
Minimum Temperature   60   51   51   +9   65   in 2007   34   in 1945  
Average Temperature   72   54   59   +13   74   in 1941   44   in 1996  
 Month Avg Max Temperature   74.5   56.0   67.0   +7.5   79.8   in 1927   52.5   in 1899  
Month Avg Min Temperature   52.8   50.5   52.0   +0.8   62.8   in 1954   38.3   in 1899  
Month Average Temperature   64.0   53.5   59.5   +4.5   71.5   in 1927   45.8   in 1899  
High Heat Index   86               86   in 2023            
Low Wind Chill       45                     34   in 1996  
Heating Degree Days   0   11   6   -6   21   in 1996   0   in Many  
Month Heating DD   11   46   22   -11   77   in 1899   0   in 1954  
Season Heating DD   72   46   22   +50   254   in 1956   29   in 1921  
Cooling Degree Days   7   0   0   +7   9   in 1941   0   in Many  
Month Cooling DD   7   0   4   +3   26   in 1927   0   in 2022  
Year Cooling DD   715   770   607   +108   868   in 2020   290   in 1902  
Maximum Dew Point   71   55   58   +13   71   in 2023   29   in 1965  
Minimum Dew Point   60   45   46   +14   64   in 2007   19   in 1965  
Average  Dew Point   66   50   52   +14   67   in 2007   24   in 1965  
 Month Avg Max Dew Point   63.5   52.3   58.5   +5.0   67.5   in 1954   39.3   in 1974  
Month Avg Min Dew Point   51.5   44.0   46.5   +5.0   61.0   in 1954   31.5   in 1965  
Month Average Dew Point   57.8   48.3   52.5   +5.3   64.3   in 1954   35.5   in 1974  
Precipitation   .00   .35   .14   -.14   1.54   in 1999            
One Hour Rain   .00   .13           .66   in 1999            
Half Hour Rain   .00   .07           .29   in 2021            
Hourly Rain Rate   .00   .24           2.44   in 2014            
Month Precipitation   .00   1.26   .56   -.56   2.51   in 1984   .00   in 2023  
Year Precipitation   42.10   31.07   33.64   +8.46   48.53   in 1998   17.64   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  
    October 4, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   98%   92%   +7%   100%   in 2007   52%   in 1965  
Minimum Humidity   67%   79%   60%   +7%   97%   in 1985   33%   in 1963  
Average Humidity   83%   89%   76%   +7%   99%   in 1985   46%   in 1965  
Maximum Barometer   30.23   30.15   30.11   +00.12   30.60   in 1996   29.73   in 1987  
Minimum Barometer   30.11   29.94   29.88   +00.23   30.33   in 1972   29.30   in 1986  
Average Barometer   30.17   30.05   29.99   +00.18   30.40   in 1996   29.53   in 1986  
Average Wind   1.8   15.3   7.4   -5.6   15.3   in 2022   1.5   in 2005  
Direction   SSE   NE   W       NE SSE
High Wind Gust   10   31   24   -14   56   in 1917   10   in 2023  
Direction   N   NNE   NNE       S N
Maximum Water Temp   65.8   62.4   64.8   +1.0   68.2   in 2007   59.5   in 2010  
Minimum Water Temp   64.2   59.7   63.2   +1.1   66.6   in 2021   57.6   in 2010  
Average Water Temp   65.0   61.1   64.0   +1.0   67.1   in 2021   58.5   in 2010  
Sunrise/ AM Twilight   6:44:48 AM   6:18:07 AM            
Sunset / PM Twilight   6:22:06 PM   6:49:32 PM            
Length Of Day   11:36:39                          
Special Conditions   Dense Fog                              
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