Portsmouth Rhode Island Weather Almanac
Thursday, February 11, 2021
Cloudy, Very Light Snow & Fog early, Partly Cloudy Day to Mostly Cloudy PM, Continued Cold
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    February 11, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   33   45   39   -6   58   in 2009   10   in 1979  
Minimum Temperature   21   40   25   -4   44   in 2018   -4   in 1979  
Average Temperature   27   43   32   -5   49   in 2009   3   in 1979  
 Month Avg Max Temperature   36.3   44.4   38.1   -1.8   47.5   in 1991   23.8   in 1934  
Month Avg Min Temperature   25.5   33.1   23.9   +1.5   33.1   in 2020   8.0   in 1934  
Month Average Temperature   30.9   38.7   31.5   -0.6   38.7   in 2020   15.9   in 1934  
Precipitation   .01   .45   .12   -.11   1.98   in 1955            
One Hour   .00   .09           .35   in 1955            
Hourly Rate   .00   .15           2.58   in 2018            
Month Precipitation   1.27   1.87   1.28   -.01   4.98   in 1970   T   in 1912  
Year Precipitation   3.23   3.91   4.95   -1.72   12.38   in 1979   1.59   in 1980  
Snow   0.2   0.0   0.4   -0.2   12.8   in 1994            
Month Snow   10.5   0.0   3.6   +6.9   26.3   in 1978   0.0   in 2020  
Season Snow   22.2   12.2   20.7   +1.5   51.0   in 1996   2.8   in 1980  
Snow Depth   3   0           26   in 1978            
HDD   38   22   33   +5   62   in 1979   16   in 2009  
Month HDD   373   284   369   +4   538   in 1934   284   in 2020  
Season HDD   3034   3049   3288   -254   4255   in 1918   2613   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   21   43   30   -9   51   in 2018   -14   in 1979  
Minimum Dew Point   9   35   13   -4   43   in 2018   -23   in 1979  
Average  Dew Point   15   39   22   -7   47   in 2018   -19   in 1979  
 Month Avg Max Dew Point   30.1   38.5   28.9   +1.2   38.5   in 2020   8.6   in 1979  
Month Avg Min Dew Point   17.9   26.7   12.4   +5.5   26.7   in 2020   -3.5   in 1979  
Month Average Dew Point   24.0   32.6   22.0   +2.0   32.6   in 2020   2.6   in 1979  
    February 11, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   92%   96%   83%   +9%   100%   in 2018   45%   in 1991  
Minimum Humidity   51%   83%   52%   -1%   96%   in 2018   24%   in 1962  
Average Humidity   72%   90%   68%   +4%   98%   in 2018   38%   in 1991  
Maximum Barometer   30.28   30.15   30.13   +00.15   30.94   in 1906   29.39   in 1970  
Minimum Barometer   30.16   29.75   29.78   +00.38   30.28   in 2019   28.98   in 1970  
Average Barometer   30.22   29.95   29.95   +00.27   30.47   in 1988   29.19   in 1970  
Average Wind   5.8   5.3   8.5   -2.7   22.3   in 1973   2.3   in 1985  
Direction   NNW   E   N       NNE         N        
High Wind Gust   20   22   27   -7   58   in 1955   12   in 1985  
Direction   NNW   NW   NW       SSE         S        
High Heat Index                                      
Wind Chill   13   32   12   +1             -26   in 1979  
Maximum Water Temp   39.0   37.1   38.0   +1.0   44.0   in 2012   34.6   in 2015  
Minimum Water Temp   37.6   36.3   36.1   +1.5   42.8   in 2012   33.4   in 2019  
Average Water Temp   38.3   36.7   37.1   +1.2   43.4   in 2012   34.1   in 2015  
Sunrise/ AM Twilight   6:43:53 AM   6:15:24 AM            
Sunset / PM Twilight   5:15:00 PM   5:43:28 PM            
Length Of Day   10:31:07                          
Special Conditions   Fog                                  
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