Portsmouth Rhode Island Weather Almanac  
Tuesday, March 11, 2025  
Clear, Breezy and Continued Warm  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2025
    March 11, 2025   Record   Record  
Observed Daily Data   2025   2024   Norm   Depart   Highest   Lowest  
Maximum Temperature   57   44   44   +13   63   in 1977   22   in 2017  
Minimum Temperature   37   30   29   +8   44   in 1925   9   in 1939  
Average Temperature   47   37   37   +10   50   in 2016   19   in 2017  
 Month Avg Max Temperature   46.6   48.6   45.5   +1.2   52.7   in 1894   31.8   in 1916  
Month Avg Min Temperature   28.4   36.0   32.5   -4.1   36.0   in 2024   16.7   in 1950  
Month Average Temperature   37.8   42.5   38.9   -1.1   44.2   in 1974   26.3   in 1916  
High Heat Index   76               76   in 2024            
Low Wind Chill   33   20   20   +13             -6   in 1939  
Heating Degree Days   18   28   28   -10   46   in 2017   15   in 2016  
Month Heating DD   299   247   323   -24   426   in 1916   229   in 1974  
Season Heating DD   3961   3794   4149   -188   5182   in 1918   3437   in 2016  
Cooling Degree Days   0   0   #REF!   #REF!   0   in 1900   0   in All  
Month Cooling DD                                      
Year Cooling DD                                      
Maximum Dew Point   42   30   34   +8   54   in 2016   7   in 1960  
Minimum Dew Point   33   22   19   +14   38   in 2011   -10   in 1953  
Average  Dew Point   38   26   27   +11   46   in 2016   -1   in 1960  
 Month Avg Max Dew Point   33.5   43.6   32.6   +0.8   43.6   in 2024   17.1   in 1960    
Month Avg Min Dew Point   18.0   31.2   17.4   +0.6   31.2   in 2024   0.3   in 1950    
Month Average Dew Point   25.9   37.4   25.4   +0.5   37.4   in 2024   11.3   in 1953    
Precipitation   .00   T   .14   -.14   3.38   in 2000              
One Hour Rain   .00   T           .87   in 2000              
Half Hour Rain   .00   .00         .12   in 2011              
Hourly Rain Rate   .00   .00           .75   in 2011              
Month Precipitation   .41   5.02   1.45   -1.04   5.20   in 1994   T   in 1894    
Year Precipitation   5.59   14.58   8.55   -2.96   18.97   in 1979   3.23   in 1980    
Snow   0.0   T   0.2   -0.2   4.4   in 1924   0.0   in      
Snow Depth   0   T   0.7   -0.7   13   in 1941   0   in      
Month Snow   0.0   T   2.4   -2.4   18.9   in 1941   0.0   in 2025    
Season Snow   11.9   12.7   29.7   -17.8   74.5   in 1996   4.7   in 1998    
    March 11, 2025     Record Record  
Observed Daily Data   2025   2024   Norm   Depart   Highest Lowest  
Maximum Humidity   96%   81%   85%   +11%   100%   in 2015   44%   in 1974    
Minimum Humidity   42%   47%   47%   -5%   94%   in 2011   16%   in 1957    
Average Humidity   69%   64%   66%   +3%   97%   in 2011   37%   in 1974    
Maximum Barometer   29.88   29.70   30.11   -00.23   30.81   in 1996   29.43   in 1969    
Minimum Barometer   29.70   29.31   29.79   -00.09   30.44   in 1995   28.94   in 1992    
Average Barometer   29.79   29.51   29.95   -00.16   30.62   in 1996   29.24   in 1992    
Average Wind   7.8   18.6   8.5   -0.7   18.6   in 2024   1.1   in 1996    
Direction   S   NW   WNW       NW         SSE          
High Wind Gust   28   45   28   +0   52   in 1955   11   in 1996    
Direction   S   NW   NW       SSW         S          
Maximum Water Temp   42.4   42.4   40.0   +2.4   44.2   in 2012   35.2   in 2005    
Minimum Water Temp   40.1   40.8   38.2   +1.9   42.4   in 2012   32.6   in 2003  
Average Water Temp   41.3   41.6   39.1   +2.2   43.3   in 2012   34.0   in 2003  
Sunrise/ AM Twilight   7:03:00 AM   6:34:03 AM            
Sunset / PM Twilight   6:47:32 PM   7:15:49 PM            
Length Of Day   11:44:32                          
Special Conditions   Fog                                  
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Hour-by-Hour Weather For March 11, 2025            
Climate Weather for March 11            
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