Portsmouth Rhode Island Weather Almanac  
Monday, March 18, 2024  
Cloudy early then Partly Cloudy, Dry and Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    March 18, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   51   50   46   +5   68   in 2022   20   in 1967  
Minimum Temperature   36   37   31   +5   44   in 2022   7   in 1916  
Average Temperature   44   44   39   +5   56   in 2022   15   in 1967  
 Month Avg Max Temperature   51.3   49.1   43.6   +7.7   51.8   in 1973   31.8   in 1916  
Month Avg Min Temperature   36.2   30.9   28.9   +7.3   37.4   in 1973   19.6   in 1916  
Month Average Temperature   43.9   40.3   36.6   +7.4   44.9   in 1973   25.9   in 1916  
High Heat Index                   #N/A   in #N/A            
Low Wind Chill   29   36   20   +9             -7   in 1967  
Heating Degree Days   21   21   26   -5   50   in 1967   9   in 2022  
Month Heating DD   379   460   512   -133   703   in 1916   362   in 1973  
Season Heating DD   3926   3770   4369   -443   5389   in 1905   3564   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   36   44   35   +1   57   in 2022   -6   in 1967  
Minimum Dew Point   22   25   21   +1   40   in 2022   -14   in 1967  
Average  Dew Point   29   35   28   +1   49   in 2022   -10   in 1967  
 Month Avg Max Dew Point   42.8   35.9   33.3   +9.5   42.8   in 2024   20.9   in 1960  
Month Avg Min Dew Point   30.6   24.6   18.3   +12.3   30.6   in 2024   4.2   in 1980  
Month Average Dew Point   37.0   30.3   26.2   +10.8   37.0   in 2024   15.1   in 1950  
Precipitation   .00   .02   .15   -.15   4.26   in 1968            
One Hour Rain   .00   .02           .67   in 1968            
Half Hour Rain   .00   .01           .15   in 2021            
Hourly Rain Rate   .00   .00           .73   in 2021            
Month Precipitation   5.05   3.48   2.45   +2.60   8.03   in 1968   .08   in 1915  
Year Precipitation   14.61   12.61   9.68   +4.93   19.20   in 1979   5.30   in 1901  
Snow   0.0   0.0   0.2   -0.2   4.5   in 1949            
Snow Depth   0   0   0   -0   9   in 1896            
Month Snow   T   0.1   3.8   -3.8   20.3   in 1916   0.0   in 2011  
Season Snow   12.7   9.1   31.4   -18.7   75.0   in 2005   4.7   in 1998  
    March 18, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   76%   97%   82%   -6%   100%   in 2012   45%   in 2015  
Minimum Humidity   38%   49%   45%   -7%   90%   in 1968   20%   in 1992  
Average Humidity   57%   73%   64%   -7%   95%   in 1968   33%   in 1992  
Maximum Barometer   29.69   29.74   30.11   -00.42   30.66   in 2000   29.19   in 1973  
Minimum Barometer   29.58   29.57   29.80   -00.22   30.33   in 2000   28.91   in 1973  
Average Barometer   29.64   29.66   29.95   -00.32   30.50   in 2000   29.05   in 1973  
Average Wind   8.5   6.1   8.7   -0.2   19.2   in 1973   1.5   in 1996  
Direction   NW   NW   WNW       W   SSE  
High Wind Gust   23   20   27   -4   48   in 1928   11   in 2004  
Direction   NNW   NW   NW       NE         SE        
Maximum Water Temp   45.3   43.2   40.8   +4.5   47.1   in 2012   35.4   in 2015  
Minimum Water Temp   44.1   42.1   38.8   +5.3   44.9   in 2012   33.9   in 2015  
Average Water Temp   44.7   42.7   39.8   +4.9   46.0   in 2012   34.7   in 2015  
Sunrise/ AM Twilight   6:50:51 AM   6:22:20 AM            
Sunset / PM Twilight   6:55:39 PM   7:23:36 PM            
Length Of Day   12:04:48                          
Special Conditions   None                                  
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Hour-by-Hour Weather For March 18, 2024            
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