Portsmouth Rhode Island Weather Almanac  
Sunday, January 12, 2025  
Clear to Partly PM, Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2025
    January 12, 2025   Record   Record  
Observed Daily Data   2025   2024   Norm   Depart   Highest   Lowest  
Maximum Temperature   38   49   38   +0   66   in 2020   14   in 1982  
Minimum Temperature   25   33   24   +1   46   in 2017   -4   in 1982  
Average Temperature   32   41   31   +1   53   in 2020   5   in 1982  
 Month Avg Max Temperature   35.5   41.7   39.3   -3.8   50.3   in 2000   23.8   in 1981  
Month Avg Min Temperature   25.2   28.5   25.5   -0.3   36.9   in 2007   6.7   in 1981  
Month Average Temperature   30.7   35.2   32.5   -1.8   43.2   in 2007   15.5   in 1981  
High Heat Index   76               76   in 2024            
Low Wind Chill   13   29   13   +0             -29   in 1982  
Heating Degree Days   33   24   34   -1   60   in 1982   12   in 2020  
Month Heating DD   412   358   390   +22   594   in 1981   262   in 2007  
Season Heating DD   2064   2038   2260   -196   2970   in 1918   1678   in 2016    
Cooling Degree Days   0   0   #REF!   #REF!   0   in 1900   0   in All    
Month Cooling DD                                        
Year Cooling DD                                        
Maximum Dew Point   26   37   31   -5   56   in 2020   -10   in 1981    
Minimum Dew Point   20   30   15   +5   44   in 2017   -20   in 1981    
Average  Dew Point   23   34   23   +0   48   in 2018   -15   in 1981  
 Month Avg Max Dew Point   24.6   33.9   31.9   -7.3   43.7   in 2000   10.6   in 1981  
Month Avg Min Dew Point   16.3   22.6   16.0   +0.3   28.8   in 2023   -10.1   in 1981  
Month Average Dew Point   20.7   28.5   24.0   -3.3   34.7   in 2023   0.3   in 1981  
Precipitation   .00   .00   .12   -.12   1.69   in 2018            
One Hour Rain   .00   .00           .46   in 2018            
Half Hour Rain   .00   .00         .33   in 2018            
Hourly Rain Rate   .00   .00           3.13   in 2018            
Month Precipitation   .46   3.25   1.46   -1.00   4.52   in 1979   .09   in 1984  
Year Precipitation   .46   3.25   1.46   -1.00   4.52   in 1979   .09   in 1984    
Snow   0.0   0.0   0.3   -0.3   8.2   in 2011   0.0   in      
Snow Depth   T   0   1.5   -2   21   in 1996   0   in      
Month Snow   0.4   3.4   3.6   -3.2   25.8   in 1996   0.0   in 2007    
Season Snow   0.6   3.5   10.7   -10.1   41.6   in 1996   T   in 2000    
    January 12, 2025     Record Record  
Observed Daily Data   2025   2024   Norm   Depart   Highest Lowest  
Maximum Humidity   82%   90%   82%   -0%   100%   in 2018   43%   in 1968    
Minimum Humidity   59%   49%   54%   +5%   97%   in 2018   20%   in 1992    
Average Humidity   71%   70%   68%   +2%   99%   in 2018   34%   in 1968    
Maximum Barometer   30.02   30.23   30.19   -00.17   30.86   in 1984   29.60   in 1990  
Minimum Barometer   29.66   29.91   29.84   -00.18   30.43   in 1968   28.90   in 1987  
Average Barometer   29.84   30.07   30.01   -00.17   30.55   in 1984   29.32   in 1987  
Average Wind   8.2   6.9   8.1   +0.1   16.4   in 2011   2.1   in 1955  
Direction   NNW   WNW   NW       W         NNW        
High Wind Gust   31   30   27   +4   51   in 1986   7   in 1993  
Direction   NNW   E   NW       SW         ENE        
Maximum Water Temp   39.9   45.5   41.5   -1.6   49.3   in 2012   36.3   in 2019  
Minimum Water Temp   38.3   44.2   39.4   -1.1   45.6   in 2012   33.6   in 2019  
Average Water Temp   39.1   44.9   40.4   -1.3   47.5   in 2012   35.0   in 2019  
Sunrise/ AM Twilight   7:10:19 AM   6:39:39 AM            
Sunset / PM Twilight   4:36:28 PM   5:07:36 PM            
Length Of Day   16:37:02                          
Special Conditions   None                                  
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