Portsmouth Rhode Island Weather Almanac  
Saturday, March 18, 2023  
Cloudy, Light Rain early, Partly Cloudy PM, Continued Warm  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    March 18, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   50   68   46   +4   68   in 2022   20   in 1967  
Minimum Temperature   37   44   31   +6   44   in 2022   7   in 1916  
Average Temperature   44   56   39   +5   56   in 2022   15   in 1967  
 Month Avg Max Temperature   45.7   49.1   43.6   +2.1   51.8   in 1973   31.8   in 1916  
Month Avg Min Temperature   32.8   30.9   28.9   +3.8   37.4   in 1973   19.6   in 1916  
Month Average Temperature   39.4   40.3   36.6   +2.9   44.9   in 1973   25.9   in 1916  
High Heat Index                                      
Low Wind Chill   36   43   20   +16             -7   in 1967  
Heating Degree Days   21   9   26   -5   50   in 1967   9   in 2022  
Month HDD   460   445   512   -52   703   in 1916   362   in 1973  
Season HDD   3770   4015   4338   -568   5389   in 1905   3564   in 2016  
Cooling Degree Days   0   #N/A   #REF!   #REF!   0   in 2023   0   in    
Month CDD                                 in    
Year CDD                                      
Maximum Dew Point   44   57   35   +9   57   in 2022   -6   in 1967  
Minimum Dew Point   25   40   21   +4   40   in 2022   -14   in 1967  
Average  Dew Point   35   49   28   +7   49   in 2022   -10   in 1967  
 Month Avg Max Dew Point   35.9   40.8   33.3   +2.6   41.6   in 1973   20.9   in 1960  
Month Avg Min Dew Point   24.6   21.4   18.3   +6.2   29.7   in 1973   4.2   in 1980  
Month Average Dew Point   30.5   31.1   26.2   +4.3   35.6   in 1973   15.1   in 1950  
Precipitation   .02   .00   .15   -.13   4.26   in 1968            
One Hour   .02   .00           .67   in 1968            
Hourly Rate   .00   .00           .73   in 2021            
Month Precipitation   3.48   1.35   2.45   +1.03   8.03   in 1968   .08   in 1915  
Year Precipitation   12.61   10.74   9.55   +3.06   19.20   in 1979   5.30   in 1901  
Snow   0.0   0.0   0.2   -0.2   4.5   in 1949       in    
Snow Depth   0   0           9   in 1896       in    
Month Snow   0.1   0.5   3.8   -3.7   20.3   in 1916   0.0   in 2011  
Season Snow   9.1   34.2   31.1   -22.0   75.0   in 2005   4.7   in 1998  
    March 18, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   97%   99%   82%   +15%   100%   in 2012   45%   in 2015  
Minimum Humidity   49%   67%   45%   +4%   90%   in 1968   20%   in 1992  
Average Humidity   73%   83%   64%   +9%   95%   in 1968   33%   in 1992  
Maximum Barometer   29.74   30.06   30.11   -00.37   30.66   in 2000   29.19   in 1973  
Minimum Barometer   29.57   29.86   29.80   -00.23   30.33   in 2000   28.91   in 1973  
Average Barometer   29.66   29.96   29.95   -00.30   30.50   in 2000   29.05   in 1973  
Average Wind   6.1   5.2   8.7   -2.6   19.2   in 1973   1.5   in 1996  
Direction   NW   NW   WNW       W SSE
High Wind Gust   20   17   27   -7   48   in 1928   11   in 2004  
Direction   NW   SW   NW       NE SE
Maximum Water Temp   43.2   45.3   40.6   +2.6   47.1   in 2012   35.4   in 2015  
Minimum Water Temp   42.1   42.6   38.6   +3.5   44.9   in 2012   33.9   in 2015  
Average Water Temp   42.7   44.0   39.7   +3.0   46.0   in 2012   34.7   in 2015  
Sunrise/ AM Twilight   6:52:07 AM   7:22:20 AM            
Sunset / PM Twilight   6:54:48 PM   7:23:36 PM            
Length Of Day   12:02:41                          
Special Conditions   None                              
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