Portsmouth Rhode Island Weather Almanac  
Saturday, January 4, 2025  
Clear, Windy, Dry and Colder  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2025
    January 4, 2025   Record   Record  
Observed Daily Data   2025   2024   Norm   Depart   Highest   Lowest  
Maximum Temperature   31   43   40   -9   59   in 2000   9   in 1904  
Minimum Temperature   26   27   26   +0   51   in 1950   -4   in 1981  
Average Temperature   29   35   33   -4   54   in 1950   4   in 1904  
 Month Avg Max Temperature   41.3   41.8   40.0   +1.3   55.3   in 2000   13.8   in 1918  
Month Avg Min Temperature   27.3   27.3   26.3   +1.0   39.0   in 2000   0.8   in 1918  
Month Average Temperature   34.3   34.5   33.3   +3.5   47.3   in 2000   7.5   in 1918  
High Heat Index   76               76   in 2024            
Low Wind Chill   14   15   16   -2             -28   in 1981  
Heating Degree Days   36   30   32   +4   61   in 1904   11   in 1950  
Month Heating DD   113   122   127   -14   230   in 1918   71   in 2000  
Season Heating DD   1765   1802   1997   -232   2677   in 1918   1443   in 2016    
Cooling Degree Days   0   0   #REF!   #REF!   0   in 1900   0   in All    
Month Cooling DD                                        
Year Cooling DD                                        
Maximum Dew Point   20   33   32   -12   57   in 2000   7   in 1981    
Minimum Dew Point   13   12   17   -4   46   in 1950   -24   in 1981    
Average  Dew Point   17   23   25   -8   50   in 2000   -9   in 1981  
 Month Avg Max Dew Point   32.0   30.5   32.8   -0.8   50.3   in 2000   14.3   in 1981  
Month Avg Min Dew Point   22.0   20.5   17.0   +5.0   36.3   in 2000   -10.8   in 1981  
Month Average Dew Point   27.3   25.8   25.0   +2.3   43.3   in 2000   1.8   in 1981  
Precipitation   .00   .00   .12   -.12   1.85   in 1944            
One Hour Rain   .00   .00           .30   in 1982            
Half Hour Rain   .00   .00         .13   in 2004            
Hourly Rain Rate   .00   .00           .71   in 2004            
Month Precipitation   .42   .00   .48   -.06   3.53   in 1919   .00   in 2024  
Year Precipitation   .42   .00   .48   -.06   3.53   in 1919   .00   in 2024    
Snow   0.0   0.0   0.3   -0.3   12.5   in 2018   0.0   in      
Snow Depth   0   0   0.9   -1   19   in 1948   0   in      
Month Snow   0.0   0.0   1.2   -1.2   12.5   in 2018   0.0   in 2025    
Season Snow   0.2   0.1   8.3   -8.1   31.1   in 1905   T   in 2000    
    January 4, 2025     Record Record  
Observed Daily Data   2025   2024   Norm   Depart   Highest Lowest  
Maximum Humidity   71%   82%   85%   -14%   100%   in 2023   44%   in 1965    
Minimum Humidity   48%   49%   57%   -9%   97%   in 2023   25%   in 2002    
Average Humidity   60%   66%   71%   -12%   99%   in 2023   37%   in 1965    
Maximum Barometer   29.83   30.08   30.10   -00.27   30.86   in 1983   29.60   in 2017  
Minimum Barometer   29.64   29.84   29.77   -00.13   30.38   in 2008   28.79   in 2018  
Average Barometer   29.74   29.96   29.94   -00.20   30.53   in 1983   29.43   in 2018  
Average Wind   13.1   9.8   8.6   +4.5   19.4   in 1951   1.9   in 1997  
Direction   WNW   NNW   W       SSW         N        
High Wind Gust   43   32   27   +16   56   in 1944   10   in 1956  
Direction   NW   NNW   NNW       NE         SW        
Maximum Water Temp   43.7   44.4   42.3   +1.4   48.9   in 2007   36.1   in 2001  
Minimum Water Temp   41.0   43.5   40.4   +0.6   47.7   in 2007   33.2   in 2008  
Average Water Temp   42.4   44.0   41.3   +1.0   48.3   in 2007   35.3   in 2001  
Sunrise/ AM Twilight   7:11:49 AM   6:40:41 AM            
Sunset / PM Twilight   4:28:19 PM   4:59:53 PM            
Length Of Day   16:28:48                          
Special Conditions   None                                  
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