Portsmouth Rhode Island Weather Almanac
Tuesday, March 23, 2021
Mostly Cloudy and Fog early then Partly Cloudy, Light Winds and Much Warmer
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    March 23, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   65   44   48   +17   67   in 2012   27   in 1940  
Minimum Temperature   37   29   33   +4   55   in 2012   10   in 1934  
Average Temperature   51   37   40   +11   61   in 2012   20   in 1934  
 Month Avg Max Temperature   46.4   51.1   44.3   +2.1   52.3   in 2012   31.7   in 1916  
Month Avg Min Temperature   28.0   34.9   29.6   -1.6   37.8   in 2012   20.1   in 1916  
Month Average Temperature   37.5   43.3   37.2   +0.3   45.3   in 2012   26.2   in 1916  
HDD   14   28   25   -11   45   in 1934   4   in 2012  
Month HDD   633   500   639   -6   893   in 1916   454   in 2012  
Season HDD   4200   4061   4465   -265   5529   in 1905   3688   in 2016  
CDD   0   0   0   +0   0   in   0   in    
Month CDD   0   0   0   +0   0   in     0   in    
Year CDD   0   0   0   +0   0   in     0   in    
Maximum Dew Point   50   43   36   +14   56   in 2012   9   in 2017  
Minimum Dew Point   35   20   22   +13   42   in 2010   -4   in 2017  
Average  Dew Point   43   32   29   +14   47   in 2012   3   in 2017  
 Month Avg Max Dew Point   30.2   39.5   33.8   -3.6   42.8   in 2012   22.0   in 1960  
Month Avg Min Dew Point   13.0   22.3   19.0   -6.0   30.0   in 2012   7.5   in 1950  
Month Average Dew Point   21.6   30.9   26.7   -5.1   36.4   in 2012   16.2   in 1960  
Precipitation   .00   1.63   .15   -.15   3.28   in 2010            
One Hour   .00   .38           .49   in 2010            
Hourly Rate   .00   .92           1.25   in 2010            
Month Precipitation   1.88   3.87   3.20   -1.32   8.47   in 1983   .22   in 1915  
Year Precipitation   7.38   9.68   10.30   -2.92   19.24   in 1998   5.76   in 2012  
Snow   0.0   T   0.2   -0.2   1.9   in 2005            
Snow Depth   0   0           7   in 1967            
Month Snow   T   0.7   4.8   -4.8   27.8   in 1956   0.0   in 1947  
Season Snow   27.7   12.9   32.1   -4.4   76.9   in 2005   5.0   in 1998  
    March 23, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   97%   95%   81%   +16%   100%   in 1970   42%   in 2017  
Minimum Humidity   37%   64%   44%   -7%   91%   in 2010   19%   in 1973  
Average Humidity   67%   80%   63%   +4%   94%   in 2010   31%   in 2017  
Maximum Barometer   30.34   30.73   30.08   +00.26   30.73   in 2020   29.44   in 1977  
Minimum Barometer   30.25   29.85   29.79   +00.46   30.41   in 1989   29.06   in 1977  
Average Barometer   30.30   30.29   29.93   +00.36   30.55   in 1989   29.25   in 1977  
Average Wind   4.3   12.5   8.5   -4.2   17.8   in 1973   2.7   in 1985  
Direction   SSE   E   WNW       NNE         S        
High Wind Gust   14   30   27   -13   46   in 1977   12   in 1985  
Direction   NNE   E   WNW       NNW         SE        
High Heat Index                                      
Wind Chill   37   23   22   +15             3   in 1959  
Maximum Water Temp   39.7   39.5   40.9   -1.2   50.5   in 2012   35.5   in 2015  
Minimum Water Temp   38.6   37.5   38.7   -0.1   47.2   in 2012   33.8   in 2015  
Average Water Temp   39.2   38.5   39.9   -0.7   48.9   in 2012   34.7   in 2015  
Sunrise/ AM Twilight   6:41:24 AM   6:13:47 AM            
Sunset / PM Twilight   7:01:34 PM   7:29:11 PM            
Length Of Day   12:20:10                          
Special Conditions   Dense Fog                              
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