Portsmouth Rhode Island Weather Almanac  
Thursday, December 23, 2021  
Clear to Partly Cloudy PM, Windy, Dry and Colder  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    December 23, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   33   42   42   -9   62   in 2015   20   in 1989  
Minimum Temperature   26   31   28   -2   50   in 1990   2   in 1955  
Average Temperature   30   37   35   -5   55   in 2015   13   in 1989  
 Month Avg Max Temperature   47.9   42.4   44.1   +3.8   53.9   in 2015   31.5   in 1989  
Month Avg Min Temperature   34.3   31.0   31.0   +3.4   41.5   in 2015   15.0   in 1989  
Month Average Temperature   41.3   37.0   37.4   +3.9   48.0   in 2015   23.5   in 1989  
High Heat Index                                      
Low Wind Chill   17   22   18   -1             -13   in 1954  
Heating Degree Days   35   28   30   +5   52   in 1989   10   in 2015  
Month HDD   544   645   632   -88   955   in 1989   390   in 2015  
Season HDD   1338   1438   1622   -284   2202   in 1904   1185   in 2015  
Cooling Degree Days   0   0   0   +0       in         in    
Month CDD   0   0   0   +0   0   in         in    
Year Cooling Degree Days   795   871   609   +186   871   in 2020   290   in 1902  
Maximum Dew Point   21   36   34   -13   62   in 2015   -2   in 1989  
Minimum Dew Point   2   20   19   -17   50   in 1990   -7   in 1955  
Average  Dew Point   12   28   26   -14   55   in 2015   -4   in 1989  
 Month Avg Max Dew Point   41.0   35.9   35.1   +5.9   48.8   in 2015   15.9   in 1989  
Month Avg Min Dew Point   21.9   23.5   19.8   +2.1   36.3   in 2015   -1.2   in 1989  
Month Average Dew Point   31.7   29.9   27.4   +4.2   42.7   in 2015   7.4   in 1989  
Precipitation   .00   .00   .14   -.14   1.85   in 2015            
One Hour   .00   .00           .99   in 2015            
Hourly Rate   .00   .00           4.50   in 2004            
Month Precipitation   1.04   4.25   3.44   -2.40   9.27   in 1936   .37   in 1998  
Year Precipitation   46.62   41.13   44.87   +1.75   65.09   in 1983   27.14   in 1965  
Snow   0.0   0.0   0.2   -0.2   6.2   in 1905       in    
Snow Depth   0   3           17   in 2009       in    
Month Snow   0.2   7.4   4.2   -4.0   21.3   in 1981   0.0   in 2015  
Season Snow   0.2   8.0   4.8   -4.6   21.3   in 1898   0.0   in 2015  
    December 23, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   64%   80%   85%   -21%   100%   in 2017   51%   in 1960  
Minimum Humidity   29%   46%   58%   -29%   93%   in 1990   26%   in 1971  
Average Humidity   47%   63%   72%   -25%   97%   in 1990   44%   in 1960  
Maximum Barometer   30.19   30.40   30.17   +00.02   30.78   in 1971   29.76   in 1991  
Minimum Barometer   29.80   30.06   29.85   -00.05   30.64   in 1971   28.96   in 1968  
Average Barometer   30.00   30.23   30.01   -00.01   30.71   in 1971   29.46   in 1968  
Average Wind   9.8   6.8   7.8   +2.0   15.0   in 1994   1.9   in 1996  
Direction   NW   WNW   W       N         SSE        
High Wind Gust   29   29   26   +3   61   in 1994   11   in 1980  
Direction   WNW   WNW   NW       NNE         ESE        
Maximum Water Temp   46.4   44.1   44.3   +2.1   51.1   in 2011   38.9   in 2008  
Minimum Water Temp   44.1   42.4   42.0   +2.1   49.2   in 2015   36.9   in 2008  
Average Water Temp   45.3   43.3   43.2   +2.1   50.0   in 2011   37.9   in 2008  
Sunrise/ AM Twilight   7:09:19 AM   6:39:34 AM            
Sunset / PM Twilight   4:19:22 PM   4:49:07 PM            
Length Of Day   9:10:03                          
Special Conditions   None                              
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Hour-by-Hour Weather For December 23, 2021            
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