Portsmouth Rhode Island Weather Almanac  
Monday, February 27, 2023  
Mostly Cloudy early, Partly Cloudy Day to Cloudy, Light Snow & Fog Late, Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    February 27, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   38   39   41   -3   64   in 1976   17   in 1950  
Minimum Temperature   27   24   27   +0   43   in 1997   2   in 1990  
Average Temperature   33   32   34   -1   52   in 1976   10   in 1950  
 Month Avg Max Temperature   44.1   42.3   39.3   +4.8   45.2   in 2018   27.5   in 1979  
Month Avg Min Temperature   27.4   25.4   24.9   +2.5   30.9   in 2020   10.7   in 1934  
Month Average Temperature   36.0   34.1   32.6   +3.5   38.1   in 2018   19.4   in 1934  
High Heat Index                                      
Low Wind Chill   18   16   13   +5             -19   in 1990  
Heating Degree Days   32   33   31   +1   55   in 1950   13   in 1976  
Month HDD   782   835   876   -94   1230   in 1934   726   in 2018  
Season HDD   3276   3532   3795   -519   4788   in 1918   3129   in 2016  
Cooling Degree Days   0   #N/A   #REF!   #REF!   0   in 2023   0   in    
Month CDD                                 in    
Year CDD                                      
Maximum Dew Point   26   25   32   -6   54   in 1957   -6   in 1950  
Minimum Dew Point   14   11   16   -2   42   in 2000   -12   in 2006  
Average  Dew Point   20   18   24   -4   46   in 2000   -9   in 1950  
 Month Avg Max Dew Point   35.7   35.9   30.1   +5.6   40.4   in 2018   13.0   in 1979  
Month Avg Min Dew Point   17.7   16.4   13.7   +4.0   22.9   in 2018   0.9   in 1968  
Month Average Dew Point   26.9   26.1   24.0   +2.9   31.7   in 2018   7.1   in 1979  
Precipitation   .07   .00   .13   -.06   1.25   in 1912            
One Hour   .00   .00           .30   in 2020            
Hourly Rate   .00   .00           .73   in 2020            
Month Precipitation   1.50   5.69   3.30   -1.80   6.78   in 1998   .66   in 1947  
Year Precipitation   8.69   7.65   6.97   +1.72   17.40   in 1979   2.65   in 1980  
Snow   0.9   0.0   0.3   +0.6   5.4   in 1952       in    
Snow Depth   0   1           18   in 2015       in    
Month Snow   1.3   9.0   9.9   -8.6   30.4   in 1994   0.0   in 2020  
Season Snow   3.6   33.7   27.0   -23.4   62.2   in 1894   3.6   in 2023  
    February 27, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   95%   74%   82%   +13%   100%   in 2013   51%   in 1986  
Minimum Humidity   40%   43%   49%   -9%   93%   in 2000   13%   in 2004  
Average Humidity   68%   59%   66%   +2%   97%   in 2000   33%   in 2004  
Maximum Barometer   30.02   30.18   30.11   -00.09   30.75   in 1990   29.49   in 1953  
Minimum Barometer   29.80   29.77   29.80   +00.00   30.30   in 1982   29.19   in 2008  
Average Barometer   29.91   29.98   29.95   -00.04   30.46   in 1990   29.39   in 1953  
Average Wind   6.9   9.0   8.3   -1.4   15.9   in 1957   0.8   in 2007  
Direction   N   W   WNW       S NNE
High Wind Gust   18   35   27   -9   51   in 1957   7   in 2007  
Direction   NW   NW   NW       S W
Maximum Water Temp   41.5   39.9   38.7   +2.8   43.4   in 2012   32.0   in 2015  
Minimum Water Temp   39.7   37.9   36.8   +2.9   40.7   in 2012   31.2   in 2015  
Average Water Temp   40.6   38.9   37.8   +2.8   42.1   in 2012   31.6   in 2015  
Sunrise/ AM Twilight   6:23:07 AM   5:53:14 AM            
Sunset / PM Twilight   5:33:01 PM   6:02:13 PM            
Length Of Day   11:09:54                          
Special Conditions   Fog                                  
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