Portsmouth Rhode Island Weather Almanac
Sunday, February 21, 2021
Clear, Dry and Colder
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    February 21, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   33   31   40   -7   60   in 1930   18   in 1918  
Minimum Temperature   21   16   26   -5   45   in 2018   -2   in 1950  
Average Temperature   27   24   34   -7   50   in 2018   9   in 1950  
 Month Avg Max Temperature   35.6   42.7   38.8   -3.2   44.4   in 1990   23.9   in 1979  
Month Avg Min Temperature   25.2   29.7   24.6   +0.6   30.2   in 1960   8.6   in 1979  
Month Average Temperature   30.4   36.2   32.1   -1.8   36.6   in 1984   16.2   in 1979  
Precipitation   .00   .00   .13   -.13   3.20   in 1898            
One Hour   .00   .00           .39   in 1989            
Hourly Rate   .00   .00           .45   in 2004            
Month Precipitation   2.16   2.75   2.52   -.36   6.48   in 1988   .31   in 1912  
Year Precipitation   4.12   4.79   6.19   -2.07   12.74   in 1979   2.33   in 1980  
Snow   0.0   0.0   0.4   -0.4   12.2   in 1902            
Month Snow   16.0   0.0   7.6   +8.4   26.4   in 2003   0.0   in 2020  
Season Snow   27.7   12.2   24.7   +3.0   61.1   in 1996   3.5   in 1989  
Snow Depth   4   0           23   in 2015            
HDD   38   41   31   +7   56   in 1950   15   in 2018  
Month HDD   722   597   690   +32   1020   in 1979   590   in 2018  
Season HDD   3383   3362   3609   -226   4587   in 1918   2970   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   15   12   31   -16   54   in 1989   -7   in 1968  
Minimum Dew Point   9   -2   15   -6   44   in 2018   -22   in 1950  
Average  Dew Point   12   5   23   -11   48   in 2018   -12   in 1968  
 Month Avg Max Dew Point   29.0   34.6   29.7   -0.7   40.2   in 2018   6.2   in 1979  
Month Avg Min Dew Point   15.8   20.2   13.2   +2.6   23.0   in 1984   -6.6   in 1979  
Month Average Dew Point   22.4   27.4   23.0   -0.6   30.7   in 2018   -0.2   in 1979  
    February 21, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   69%   57%   83%   -14%   100%   in 2018   47%   in 1968  
Minimum Humidity   37%   25%   51%   -14%   94%   in 1996   24%   in 1950  
Average Humidity   53%   41%   67%   -14%   97%   in 1996   37%   in 1968  
Maximum Barometer   30.47   30.46   30.15   +00.32   30.67   in 1985   29.66   in 1977  
Minimum Barometer   30.18   30.29   29.81   +00.37   30.30   in 1990   29.18   in 1967  
Average Barometer   30.33   30.38   29.99   +00.34   30.46   in 1990   29.46   in 1967  
Average Wind   8.0   8.5   8.2   -0.2   21.9   in 1953   1.8   in 1994  
Direction   NNW   N   WNW       SSW         SSW        
High Wind Gust   30   24   28   +2   64   in 1953   12   in 1994  
Direction   NNW   N   WNW       SSW         SSW        
High Heat Index                                      
Wind Chill   9   1   15   -6             -26   in 1950  
Maximum Water Temp   37.2   36.1   38.2   -1.0   43.0   in 2012   32.0   in 2015  
Minimum Water Temp   36.1   34.7   36.7   -0.6   41.3   in 2012   31.6   in 2015  
Average Water Temp   36.7   35.4   37.4   -0.8   42.2   in 2012   31.8   in 2015  
Sunrise/ AM Twilight   6:30:03 AM   6:02:06 AM            
Sunset / PM Twilight   5:27:19 PM   5:55:16 PM            
Length Of Day   10:57:16                          
Special Conditions   None                              
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