Portsmouth Rhode Island Weather Almanac  
Monday, December 27, 2021  
Partly Cloudy to Cloudy PM, Light Rain Late and Colder  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2021
    December 27, 2021   Record   Record  
Observed Daily Data   2021   2020   Norm   Depart   Highest   Lowest  
Maximum Temperature   36   39   41   -5   59   in 2015   12   in 1925  
Minimum Temperature   30   24   27   +3   45   in 2015   2   in 1914  
Average Temperature   33   32   34   -1   52   in 2015   9   in 1925  
 Month Avg Max Temperature   46.3   43.0   43.6   +2.7   55.1   in 2015   30.5   in 1989  
Month Avg Min Temperature   33.5   31.2   30.5   +3.0   42.7   in 2015   14.0   in 1989  
Month Average Temperature   40.1   37.4   37.0   +3.1   49.3   in 2015   22.5   in 1989  
High Heat Index                                      
Low Wind Chill   22   18   15   +7             -16   in 1989  
Heating Degree Days   32   33   31   +1   56   in 1925   13   in 2015  
Month HDD   671   746   754   -83   1148   in 1989   425   in 2015  
Season HDD   1465   1539   1744   -279   2351   in 1904   1220   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   32   25   33   -1   57   in 2015   -8   in 1993  
Minimum Dew Point   24   18   18   +6   42   in 2015   -17   in 1968  
Average  Dew Point   28   22   26   +2   50   in 2015   -11   in 1993  
 Month Avg Max Dew Point   40.0   36.6   34.5   +5.5   50.1   in 2015   15.1   in 1989  
Month Avg Min Dew Point   21.7   23.7   19.0   +2.6   37.6   in 2015   -1.6   in 1989  
Month Average Dew Point   31.0   30.4   26.8   +4.2   44.1   in 2015   6.7   in 1989  
Precipitation   .01   .00   .14   -.13   2.52   in 1905            
One Hour   .01   .00           .26   in 1973            
Hourly Rate   .00   .00           .79   in 2012            
Month Precipitation   1.45   6.08   4.00   -2.55   9.28   in 1936   .56   in 1955  
Year Precipitation   47.03   42.96   45.43   +1.60   65.27   in 1983   27.66   in 1965  
Snow   0.0   0.0   0.3   -0.3   5.7   in 1944       in    
Snow Depth   0   0           13   in 1947       in    
Month Snow   0.8   7.4   5.3   -4.5   21.7   in 1981   0.0   in 2015  
Season Snow   0.8   8.0   5.9   -5.1   22.3   in 1904   0.0   in 2015  
    December 27, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   86%   81%   82%   +4%   100%   in 2015   49%   in 1993  
Minimum Humidity   69%   50%   53%   +16%   93%   in 1973   20%   in 1960  
Average Humidity   78%   66%   68%   +10%   96%   in 1973   39%   in 1993  
Maximum Barometer   30.09   30.36   30.19   -00.10   30.92   in 1990   29.20   in 1969  
Minimum Barometer   29.87   29.98   29.83   +00.04   30.56   in 1990   28.71   in 2010  
Average Barometer   29.98   30.17   30.01   -00.03   30.74   in 1990   28.97   in 1969  
Average Wind   5.4   4.3   8.0   -2.6   23.4   in 2010   2.1   in 1961  
Direction   NNW   NW   NW       NNW         SSW        
High Wind Gust   27   17   26   +1   55   in 1934   10   in 1967  
Direction   NW   W   WNW       NW         N        
Maximum Water Temp   45.3   44.8   43.8   +1.5   50.5   in 2015   39.0   in 2000  
Minimum Water Temp   43.7   42.4   41.7   +2.0   49.7   in 2015   34.5   in 2000  
Average Water Temp   44.5   43.6   42.7   +1.8   50.1   in 2015   36.8   in 2000  
Sunrise/ AM Twilight   7:10:45 AM   6:41:03 AM            
Sunset / PM Twilight   4:21:56 PM   4:51:39 PM            
Length Of Day   9:11:11                          
Special Conditions   None                              
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