Portsmouth Rhode Island Weather Almanac
Wednesday, January 20, 2021
Mostly Cloudy, Light Snow early then Partly Cloudy PM and Colder
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    January 20, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   39   29   37   +2   56   in 1947   15   in 1994  
Minimum Temperature   24   17   23   +1   43   in 1900   -1   in 1971  
Average Temperature   32   23   30   +2   50   in 1900   8   in 1971  
 Month Avg Max Temperature   41.8   43.3   38.5   +3.3   46.2   in 2007   26.5   in 1981  
Month Avg Min Temperature   30.0   30.5   24.7   +5.3   32.6   in 1932   9.4   in 1957  
Month Average Temperature   36.1   37.1   31.6   +4.5   39.5   in 2007   18.3   in 1981  
Precipitation   T   .00   .12   -.12   2.28   in 2019            
One Hour   .00   .00           .36   in 2019            
Hourly Rate   .00   .00           6.06   in 2019            
Month Precipitation   1.59   1.38   2.42   -.83   7.08   in 1979   .50   in 1902  
Year Precipitation   1.59   1.38   2.42   -.83   7.08   in 1979   .50   in 1902  
Snow   T   0.0   0.3   -0.3   10.4   in 1978            
Month Snow   0.3   3.8   6.0   -5.7   25.8   in 1996   0.0   in 2007  
Season Snow   8.3   12.2   13.1   -4.8   41.6   in 1996   0.2   in 1914  
Snow Depth   0   T           10   in 1936            
HDD   33   42   35   -2   57   in 1971   15   in 1900  
Month HDD   578   558   668   -90   934   in 1981   510   in 2007  
Season HDD   2226   2438   2535   -309   3290   in 1918   1948   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   30   17   29   +1   52   in 1986   -2   in 1971  
Minimum Dew Point   12   1   13   -1   38   in 1995   -13   in 1971  
Average  Dew Point   21   9   21   +0   44   in 1986   -8   in 1971  
 Month Avg Max Dew Point   27.5   32.4   31.0   -3.5   37.1   in 1950   12.9   in 1981  
Month Avg Min Dew Point   22.9   21.1   15.0   +7.9   24.8   in 2006   -5.9   in 1981  
Month Average Dew Point   25.3   29.1   23.0   +2.3   32.2   in 2006   3.5   in 1981  
Maximum Humidity   87%   66%   82%   +5%   100%   in 2019   54%   in 1983  
Minimum Humidity   53%   32%   50%   +3%   92%   in 1995   24%   in 2003  
Average Humidity   70%   49%   66%   +4%   96%   in 1995   44%   in 1983  
Maximum Barometer   30.00   30.32   30.08   -00.08   30.89   in 1957   29.49   in 1985  
Minimum Barometer   29.78   29.88   29.75   +00.03   30.54   in 1957   28.93   in 1964  
Average Barometer   29.89   30.10   29.92   -00.03   30.72   in 1957   29.33   in 1986  
Average Wind   8.3   12.9   9.2   -0.9   22.3   in 1961   1.3   in 1990  
Direction   NW   NNW   WNW       N         SSE        
High Wind Gust   32   28   27   +5   53   in 1978   11   in 2017  
Direction   NNW   NNW   WNW       NE         SSW        
High Heat Index                                      
Wind Chill   14   3   12   +2             -28   in 1971  
Maximum Water Temp   42.1   38.0   39.9   +2.2   47.7   in 2007   35.0   in 1997  
Minimum Water Temp   40.8   36.0   37.7   +3.1   43.2   in 2007   32.9   in 2018  
Average Water Temp   41.5   37.0   38.7   +2.7   45.4   in 2007   34.0   in 1997  
Sunrise/ AM Twilight   7:05:47 AM   6:35:47 AM            
Sunset / PM Twilight   4:47:23 PM   5:17:23 PM            
Length Of Day   9:41:36                          
Special Conditions   Fog, Haze                              
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