Portsmouth Rhode Island Weather Almanac  
Monday, March 20, 2023  
Clear and Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    March 20, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   44   64   47   -3   67   in 2010   29   in 1923  
Minimum Temperature   29   45   32   -3   45   in 2022   7   in 1967  
Average Temperature   37   55   39   -2   55   in 2022   21   in 1923  
 Month Avg Max Temperature   45.4   50.2   43.9   +1.5   51.8   in 1894   31.5   in 1916  
Month Avg Min Temperature   32.4   32.2   29.2   +3.2   36.9   in 1973   19.5   in 1916  
Month Average Temperature   39.1   41.5   36.8   +2.3   44.2   in 1973   25.7   in 1916  
High Heat Index                                      
Low Wind Chill   21   39   23   -2             -6   in 1967  
Heating Degree Days   28   10   26   +2   44   in 1923   10   in 2022  
Month HDD   518   471   564   -46   786   in 1916   417   in 1973  
Season HDD   3828   4041   4390   -562   5437   in 1905   3622   in 2016  
Cooling Degree Days   0   #N/A   #REF!   #REF!   0   in 2023   0   in    
Month CDD                                 in    
Year CDD                                      
Maximum Dew Point   31   53   35   -4   56   in 2012   15   in 1967  
Minimum Dew Point   15   35   21   -6   41   in 2012   -6   in 1967  
Average  Dew Point   23   44   28   -5   49   in 2012   5   in 1967  
 Month Avg Max Dew Point   35.2   42.1   33.5   +1.7   42.1   in 2022   22.0   in 1960  
Month Avg Min Dew Point   23.3   23.1   18.6   +4.7   29.6   in 1983   4.8   in 1950  
Month Average Dew Point   29.5   32.6   26.4   +3.1   34.4   in 1973   15.2   in 1950  
Precipitation   .00   .02   .15   -.15   1.24   in 1954            
One Hour   .00   .01           .32   in 1996            
Hourly Rate   .00   .00           1.42   in 2008            
Month Precipitation   3.48   1.65   2.75   +.73   8.05   in 1968   .08   in 1915  
Year Precipitation   12.61   11.04   9.85   +2.76   19.20   in 1979   5.30   in 1901  
Snow   0.0   0.0   0.2   -0.2   6.2   in 1944       in    
Snow Depth   0   0           21   in 1956       in    
Month Snow   0.1   0.5   4.2   -4.1   27.8   in 1956   0.0   in 2011  
Season Snow   9.1   34.2   31.5   -22.4   75.0   in 2005   4.7   in 1998  
    March 20, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   80%   98%   86%   -6%   100%   in 2014   47%   in 1959  
Minimum Humidity   44%   60%   47%   -3%   87%   in 1998   16%   in 1991  
Average Humidity   62%   79%   67%   -5%   92%   in 1996   35%   in 1959  
Maximum Barometer   30.28   29.76   30.10   +00.18   30.68   in 1993   29.47   in 1996  
Minimum Barometer   30.13   29.65   29.81   +00.32   30.47   in 2011   28.73   in 1975  
Average Barometer   30.21   29.71   29.95   +00.25   30.57   in 1993   29.23   in 1975  
Average Wind   8.5   5.8   7.9   +0.6   23.3   in 1958   2.1   in 1981  
Direction   W   WNW   N       NE NW
High Wind Gust   29   24   26   +3   64   in 1958   10   in 2015  
Direction   SW   NW   S       NE SE
Maximum Water Temp   42.6   45.3   41.0   +1.6   49.0   in 2012   35.2   in 2015  
Minimum Water Temp   41.0   43.2   39.0   +2.0   46.0   in 2012   33.9   in 2015  
Average Water Temp   41.8   44.3   40.1   +1.7   47.5   in 2012   34.6   in 2015  
Sunrise/ AM Twilight   6:48:44 AM   7:18:56 AM            
Sunset / PM Twilight   6:57:02 PM   7:25:50 PM            
Length Of Day   12:08:18                          
Special Conditions   None                              
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