Portsmouth Rhode Island Weather Almanac  
Tuesday, March 12, 2024  
Clear, Windy and Much Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    March 12, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   57   45   44   +13   65   in 1973   26   in 2017  
Minimum Temperature   35   32   30   +5   45   in 2021   9   in 1900  
Average Temperature   46   39   37   +9   55   in 2021   19   in 1900  
 Month Avg Max Temperature   49.3   45.3   42.7   +6.7   52.5   in 1894   32.1   in 1916  
Month Avg Min Temperature   35.9   31.9   28.2   +7.8   36.4   in 1973   18.2   in 1950  
Month Average Temperature   42.8   38.8   35.8   +7.1   44.2   in 1973   26.3   in 1916  
High Heat Index                   #N/A   in #N/A            
Low Wind Chill   29   23   21   +8             -6   in 1998  
Heating Degree Days   19   26   28   -9   46   in 1900   10   in 2021  
Month Heating DD   266   314   351   -85   464   in 1916   250   in 1973  
Season Heating DD   3813   3624   4208   -395   5210   in 1918   3462   in 2016  
Cooling Degree Days   0   0   0   +0       in     0   in Many  
Month Cooling DD   0   0   0   +0   3   in 2022   0   in Many  
Year Cooling DD   726   784   609   +117   871   in 2020   290   in 1902  
Maximum Dew Point   32   35   34   -2   53   in 1973   1   in 1984  
Minimum Dew Point   23   24   19   +4   44   in 1982   -10   in 1984  
Average  Dew Point   28   30   27   +1   47   in 1982   -5   in 1984  
 Month Avg Max Dew Point   42.7   34.3   32.8   +9.9   42.7   in 2024   17.9   in 1960  
Month Avg Min Dew Point   30.5   23.7   17.5   +13.0   30.6   in 1973   2.4   in 1950  
Month Average Dew Point   36.8   29.0   25.5   +11.3   36.8   in 2024   11.6   in 1960  
Precipitation   .00   .00   .14   -.14   2.05   in 1985            
One Hour Rain   .00   .00           .59   in 1959            
Half Hour Rain   .00   .00           .23   in 2022            
Hourly Rain Rate   .00   .00           1.22   in 2022            
Month Precipitation   5.02   1.59   1.59   +3.43   5.49   in 1983   T   in 1894  
Year Precipitation   14.58   10.72   8.82   +5.76   18.97   in 1979   3.23   in 1980  
Snow   0.0   0.0   0.2   -0.2   7.6   in 1939            
Snow Depth   0   0   1   -1   12   in 1941            
Month Snow   T   0.1   2.6   -2.6   18.9   in 1941   0.0   in 2011  
Season Snow   12.7   9.1   30.2   -17.5   75.0   in 2005   4.7   in 1998  
    March 12, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   68%   88%   83%   -15%   100%   in 2013   44%   in 1984  
Minimum Humidity   34%   62%   48%   -14%   91%   in 2013   18%   in 2021  
Average Humidity   51%   75%   66%   -15%   96%   in 2013   33%   in 1974  
Maximum Barometer   29.84   30.09   30.14   -00.30   30.72   in 1995   29.30   in 1983  
Minimum Barometer   29.69   29.91   29.79   -00.10   30.56   in 1995   28.90   in 1983  
Average Barometer   29.77   30.00   29.97   -00.20   30.64   in 1995   29.10   in 1983  
Average Wind   9.5   8.1   8.4   +1.1   18.0   in 1980   2.8   in 1964  
Direction   NW   N   WNW       WNW   SW  
High Wind Gust   31   24   27   +4   47   in 1980   12   in 1964  
Direction   NW   NE   NW       W         S        
Maximum Water Temp   42.6   43.0   39.9   +2.7   45.8   in 2012   35.1   in 2005  
Minimum Water Temp   40.5   41.7   38.2   +2.3   43.7   in 2012   33.6   in 2017  
Average Water Temp   41.6   42.4   39.1   +2.5   44.8   in 2012   34.8   in 2005  
Sunrise/ AM Twilight   7:00:56 AM   6:32:24 AM            
Sunset / PM Twilight   6:48:56 PM   7:16:57 PM            
Length Of Day   11:48:00                          
Special Conditions   None                                  
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