Portsmouth Rhode Island Weather Almanac  
Tuesday, December 20, 2022  
Clear, Windy and Continued Cool  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2022
    December 20, 2022   Record   Record  
Observed Daily Data   2022   2021   Norm   Depart   Highest   Lowest  
Maximum Temperature   41   34   42   -1   58   in 1957   11   in 1942  
Minimum Temperature   29   20   29   +0   51   in 1957   -6   in 1942  
Average Temperature   35   27   36   -1   55   in 1957   3   in 1942  
 Month Avg Max Temperature   44.1   48.9   44.4   -0.3   53.3   in 2015   31.6   in 1904  
Month Avg Min Temperature   33.0   35.0   31.3   +1.7   40.9   in 2015   16.4   in 1989  
Month Average Temperature   38.8   42.1   37.8   +1.0   47.4   in 2015   24.9   in 1989  
High Heat Index                                      
Low Wind Chill   19   10   15   +5             -21   in 1942  
Heating Degree Days   30   38   29   +1   62   in 1942   10   in 1957  
Month HDD   524   458   543   -19   802   in 1989   352   in 2015  
Season HDD   1345   1252   1533   -188   2098   in 1904   1147   in 2015  
Cooling Degree Days   0   0   #REF!   #REF!   0   in 2022   0   in    
Month CDD                                 in    
Year CDD   777   795   609   +168   871   in 2020   290   in 1902  
Maximum Dew Point   26   27   35   -9   56   in 2002   -1   in 1983  
Minimum Dew Point   20   12   20   +0   45   in 1957   -17   in 1955  
Average  Dew Point   23   20   27   -4   49   in 1957   -8   in 1955  
 Month Avg Max Dew Point   37.6   42.1   35.5   +2.1   47.6   in 2015   18.0   in 1989  
Month Avg Min Dew Point   24.8   23.0   20.3   +4.5   35.4   in 2015   -0.2   in 1989  
Month Average Dew Point   31.5   32.8   27.9   +3.5   41.7   in 2015   8.9   in 1989  
Precipitation   .00   .00   .15   -.15   1.48   in 2002            
One Hour   .00   .00           .49   in 2002            
Hourly Rate   .00   .00           .00   in              
Month Precipitation   3.55   .97   3.01   +.54   9.27   in 1936   .27   in 1998  
Year Precipitation   41.36   46.55   44.44   -3.08   63.81   in 1983   27.14   in 1965  
Snow   0.0   0.0   0.2   -0.2   16.0   in 2009       in    
Snow Depth   0   0           14   in 1904       in    
Month Snow   1.5   0.2   3.6   -2.1   21.3   in 1981   0.0   in 2015  
Season Snow   1.5   0.2   4.2   -2.7   21.3   in 1898   0.0   in 2015  
    December 20, 2022     Record Record
Observed Daily Data   2022   2021   Norm   Depart   Highest Lowest
Maximum Humidity   77%   78%   84%   -7%   100%   in 2002   44%   in 1955  
Minimum Humidity   55%   56%   56%   -1%   90%   in 1987   22%   in 1962  
Average Humidity   66%   67%   70%   -4%   95%   in 1987   35%   in 1955  
Maximum Barometer   30.40   30.37   30.19   +00.21   30.97   in 1990   29.50   in 1995  
Minimum Barometer   30.18   30.18   29.86   +00.32   30.42   in 1979   29.09   in 1934  
Average Barometer   30.29   30.28   30.03   +00.26   30.60   in 1990   29.43   in 1995  
Average Wind   9.6   5.8   8.0   +1.6   17.5   in 2009   2.2   in 1993  
Direction   NNW   NNW   WNW       NW SW
High Wind Gust   29   21   25   +4   48   in 1970   9   in 2020  
Direction   NNW   NNW   NNW       WNW NNW
Maximum Water Temp   44.8   46.9   45.1   -0.3   50.7   in 2006   40.8   in 2019  
Minimum Water Temp   42.3   43.7   42.4   -0.1   47.3   in 2015   37.9   in 2019  
Average Water Temp   43.6   45.3   43.8   -0.2   48.9   in 2011   39.4   in 2019  
Sunrise/ AM Twilight   7:07:44 AM   6:38:06 AM            
Sunset / PM Twilight   4:17:41 PM   4:47:34 PM            
Length Of Day   9:09:57                          
Special Conditions   None                              
Comments      
Hour-by-Hour Weather For December 20, 2022            
Climate Weather for December 20            
Weather History For December 20            
Weather Calendar            
Back To Weather Stat Page            
Home