Portsmouth Rhode Island Weather Almanac  
Monday, September 25, 2023  
Cloudy, Rainy, Foggy, Windy, Continued Cool  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    September 25, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   61   70   69   -8   86   in 1920   57   in 1977  
Minimum Temperature   57   49   55   +2   67   in 2011   40   in 1963  
Average Temperature   59   60   62   -3   75   in 1926   50   in 1950  
 Month Avg Max Temperature   76.1   73.6   72.9   +3.2   79.1   in 1983   67.5   in 1963  
Month Avg Min Temperature   62.2   58.3   58.1   +4.1   63.4   in 1961   51.9   in 1962  
Month Average Temperature   69.4   66.2   65.5   +4.0   71.2   in 1961   60.2   in 1963  
High Heat Index   62   71   69   -7   83   in 2017            
Low Wind Chill       40                     37   in 1950  
Heating Degree Days   6   5   4   +2   15   in 1950   0   in 2021  
Month Heating DD   25   37   49   -24   132   in 1963   2   in 2021  
Season Heating DD   25   37   49   -24   159   in 1956   2   in 2021  
Cooling Degree Days   0   0   1   -1   10   in 1926   0   in 2023  
Month Cooling DD   136   66   61   +75   171   in 1961   7   in 1893  
Year Cooling DD   708   777   598   +110   848   in 2020   283   in 1902  
Maximum Dew Point   61   64   61   +0   71   in 2011   38   in 1950  
Minimum Dew Point   56   46   50   +6   66   in 2011   28   in 1950  
Average  Dew Point   59   55   56   +3   69   in 2011   33   in 1950  
 Month Avg Max Dew Point   68.0   63.9   63.3   +4.6   68.0   in 2023   55.8   in 1967  
Month Avg Min Dew Point   59.9   54.0   53.6   +6.3   59.9   in 2023   45.2   in 1967  
Month Average Dew Point   64.1   59.2   58.4   +5.7   64.1   in 2023   50.5   in 1967  
Precipitation   .31   .00   .13   +.18   2.44   in 1991            
One Hour Rain   .12   .00           .64   in 1961            
Half Hour Rain   .10   .00           .18   in 2018            
Hourly Rain Rate   .78   .00           2.97   in 2021            
Month Precipitation   5.27   4.01   3.10   +2.17   10.15   in 1961   .31   in 1959  
Year Precipitation   40.89   29.43   32.38   +8.51   48.03   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  
    September 25, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   92%   92%   +7%   100%   in 2018   74%   in 1964  
Minimum Humidity   93%   65%   58%   +35%   93%   in 2023   29%   in 1963  
Average Humidity   96%   79%   75%   +21%   97%   in 2001   55%   in 1950  
Maximum Barometer   30.25   29.88   30.15   +00.10   30.57   in 2018   29.85   in 1969  
Minimum Barometer   29.99   29.62   29.94   +00.05   30.40   in 2008   29.43   in 1991  
Average Barometer   30.12   29.75   30.05   +00.07   30.45   in 2008   29.66   in 1991  
Average Wind   11.5   6.2   6.2   +5.3   13.4   in 1958   1.1   in 1994  
Direction   NE   SSW   SSW       SSW S
High Wind Gust   25   23   21   +4   44   in 1991   8   in 1994  
Direction   NE   SSW   SW       SW N
Maximum Water Temp   66.2   71.2   66.9   -0.7   71.2   in 2021   64.0   in 1997  
Minimum Water Temp   64.6   70.2   65.1   -0.5   70.2   in 2021   61.7   in 1997  
Average Water Temp   65.4   70.7   66.0   -0.6   70.7   in 2021   62.9   in 1997  
Sunrise/ AM Twilight   6:35:21 AM   6:08:42 AM            
Sunset / PM Twilight   6:37:26 PM   7:04:49 PM            
Length Of Day   12:02:05                          
Special Conditions   Fog                                  
Comments   Remnants Of TS Ophelia  
Hour-by-Hour Weather For September 25, 2023            
Climate Weather for September 25            
Weather History For September 25            
Weather Calendar            
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