Portsmouth Rhode Island Weather Almanac  
Monday, March 13, 2023  
Cloudy, Afternoon & Evening Rain and Fog, Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    March 13, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   42   36   45   -3   74   in 1990   29   in 1896  
Minimum Temperature   33   21   30   +3   46   in 2012   12   in 1980  
Average Temperature   38   29   37   +1   55   in 1990   21   in 1896  
 Month Avg Max Temperature   45.1   45.7   42.8   +2.2   52.3   in 1894   32.8   in 1916  
Month Avg Min Temperature   32.0   28.4   28.3   +3.7   37.0   in 1973   18.8   in 1984  
Month Average Temperature   38.8   37.4   35.8   +2.9   44.8   in 1973   27.1   in 1916  
High Heat Index                                      
Low Wind Chill   30   5   21   +9             -2   in 1998  
Heating Degree Days   27   36   28   -1   44   in 1896   10   in 1990  
Month HDD   341   359   379   -38   493   in 1916   263   in 1973  
Season HDD   3651   3929   4205   -554   5241   in 1905   3474   in 2016  
Cooling Degree Days   0   #N/A   #REF!   #REF!   0   in 2023   0   in    
Month CDD                                 in    
Year CDD                                      
Maximum Dew Point   40   21   34   +6   55   in 1990   7   in 1997  
Minimum Dew Point   31   7   19   +12   42   in 2006   -12   in 1980  
Average  Dew Point   36   14   27   +9   47   in 2006   3   in 1997  
 Month Avg Max Dew Point   34.7   38.6   32.8   +1.8   41.3   in 1973   18.5   in 1960  
Month Avg Min Dew Point   24.2   17.3   17.6   +6.6   30.5   in 1973   2.5   in 1980  
Month Average Dew Point   29.7   28.0   25.6   +4.1   35.9   in 1973   12.2   in 1984  
Precipitation   .53   .00   .14   +.39   2.37   in 1993            
One Hour   .12   .00           .73   in 1993            
Hourly Rate   .23   .00           1.03   in 2020            
Month Precipitation   2.12   1.23   1.73   +.39   5.49   in 1983   .04   in 1915  
Year Precipitation   11.25   10.62   8.83   +2.42   18.97   in 1979   3.23   in 1980  
Snow   0.0   0.0   0.2   -0.2   9.5   in 2018       in    
Snow Depth   0   T           13   in 1939       in    
Month Snow   0.1   0.5   2.8   -2.7   18.9   in 1941   0.0   in 2011  
Season Snow   9.1   34.2   30.1   -21.0   75.0   in 2005   4.7   in 1998  
    March 13, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   98%   70%   86%   +12%   100%   in 2013   42%   in 1997  
Minimum Humidity   80%   32%   52%   +28%   92%   in 1966   19%   in 2021  
Average Humidity   89%   51%   68%   +21%   96%   in 1953   33%   in 2021  
Maximum Barometer   30.09   30.28   30.11   -00.02   30.74   in 1984   29.42   in 1983  
Minimum Barometer   29.72   29.50   29.75   -00.03   30.40   in 1995   28.52   in 1993  
Average Barometer   29.91   29.89   29.93   -00.02   30.51   in 1984   29.25   in 1983  
Average Wind   7.1   14.8   8.5   -1.4   19.7   in 1959   2.8   in 2006  
Direction   E   WNW   WNW       W SSE
High Wind Gust   23   41   27   -4   57   in 1993   10   in 1971  
Direction   ENE   W   NNW       ENE SE
Maximum Water Temp   42.1   40.8   39.7   +2.4   45.7   in 2012   35.6   in 2003  
Minimum Water Temp   41.5   39.2   38.0   +3.5   44.6   in 2012   33.7   in 2015  
Average Water Temp   41.8   40.0   38.9   +2.9   45.2   in 2012   34.8   in 2015  
Sunrise/ AM Twilight   7:00:32 AM   6:30:43 AM            
Sunset / PM Twilight   6:49:13 PM   7:18:04 PM            
Length Of Day   11:48:41                          
Special Conditions   Fog                                  
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