Portsmouth Rhode Island Weather Almanac
Sunday, January 31, 2021
Partly Cloudy to Cloudy PM, Light Winds and Bitter Cold
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    January 31, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   26   43   37   -11   56   in 1988   16   in 1935  
Minimum Temperature   8   24   23   -15   40   in 2016   -5   in 1920  
Average Temperature   17   34   30   -13   48   in 1947   8   in 1935  
 Month Avg Max Temperature   38.3   43.0   37.8   +0.4   45.7   in 1913   27.7   in 2004  
Month Avg Min Temperature   25.9   29.4   23.9   +1.9   31.9   in 1932   13.1   in 1982  
Month Average Temperature   32.3   36.5   30.9   +1.4   38.6   in 1932   21.6   in 2004  
Precipitation   .00   .01   .11   -.11   1.32   in 1984            
One Hour   .00   .01           .27   in 2013            
Hourly Rate   .00   .00           6.78   in 2013            
Month Precipitation   1.96   2.04   3.67   -1.71   12.04   in 1979   .78   in 1955  
Year Precipitation   1.96   2.04   3.67   -1.71   12.04   in 1979   .78   in 1955  
Snow   0.0   0.0   0.3   -0.3   10.3   in 1898            
Month Snow   3.7   3.8   10.0   -6.3   33.8   in 2005   0.1   in 1934  
Season Snow   11.7   12.2   17.1   -5.4   46.0   in 2005   0.8   in 2007  
Snow Depth   1   0           23   in 2005            
HDD   48   31   34   +14   57   in 1935   17   in 1947  
Month HDD   1013   885   1055   -42   1346   in 2004   818   in 1932  
Season HDD   2661   2765   2919   -258   3770   in 1918   2291   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    
    January 31, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Dew Point   18   33   27   -9   54   in 2013   -5   in 1980  
Minimum Dew Point   -1   20   11   -12   34   in 2016   -15   in 1962  
Average  Dew Point   9   27   19   -10   38   in 2016   -9   in 1980  
 Month Avg Max Dew Point   22.7   32.4   29.9   -7.2   37.9   in 1950   14.8   in 1981  
Month Avg Min Dew Point   17.4   20.0   13.8   +3.6   23.3   in 2006   -1.4   in 1981  
Month Average Dew Point   20.2   27.3   21.8   -1.7   30.9   in 2006   6.7   in 1981  
Maximum Humidity   77%   87%   85%   -8%   100%   in 2006   42%   in 1980  
Minimum Humidity   59%   59%   50%   +9%   85%   in 2006   21%   in 1981  
Average Humidity   68%   73%   67%   +1%   93%   in 2006   32%   in 1981  
Maximum Barometer   30.35   30.37   30.16   +00.19   30.86   in 1999   29.50   in 1979  
Minimum Barometer   30.22   30.18   29.83   +00.39   30.64   in 1999   28.93   in 1966  
Average Barometer   30.29   30.28   30.01   +00.28   30.75   in 1999   29.23   in 1966  
Average Wind   4.7   3.4   8.4   -3.7   22.4   in 1966   2.9   in 1990  
Direction   NNE   S   NW       W         SW        
High Wind Gust   15   16   26   -11   55   in 1966   12   in 1990  
Direction   ENE   W   NW       WSW         S        
High Heat Index                                      
Wind Chill   -2   24   13   -15             -13   in 1962  
Maximum Water Temp   38.7   36.9   38.4   +0.3   44.8   in 2007   32.3   in 2004  
Minimum Water Temp   36.5   35.5   36.3   +0.2   42.4   in 2013   29.8   in 2004  
Average Water Temp   37.6   36.2   37.2   +0.4   42.5   in 2012   31.1   in 2004  
Sunrise/ AM Twilight   6:56:33 AM   6:27:21 AM            
Sunset / PM Twilight   5:01:06 PM   5:30:18 PM            
Length Of Day   10:04:33                          
Special Conditions   None                              
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