Portsmouth Rhode Island Weather Almanac  
Monday, December 19, 2022  
Clear to Partly Cloudy PM, Continued Windy and Cold  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2022
    December 19, 2022   Record   Record  
Observed Daily Data   2022   2021   Norm   Depart   Highest   Lowest  
Maximum Temperature   40   42   42   -2   57   in 1899   19   in 1919  
Minimum Temperature   30   24   29   +1   41   in 1996   3   in 1919  
Average Temperature   35   33   36   -1   48   in 1899   11   in 1919  
 Month Avg Max Temperature   44.3   49.6   44.5   -0.3   53.8   in 2015   31.3   in 1904  
Month Avg Min Temperature   33.2   35.7   31.4   +1.8   41.4   in 2015   16.2   in 1989  
Month Average Temperature   39.0   42.9   37.9   +1.1   47.9   in 2015   24.9   in 1989  
High Heat Index                                      
Low Wind Chill   21   15   13   +8             -11   in 1979  
Heating Degree Days   30   32   29   +1   54   in 1919   17   in 1899  
Month HDD   494   420   514   -20   761   in 1989   325   in 2015  
Season HDD   1315   1214   1504   -189   2066   in 1904   1120   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   27   42   35   -8   54   in 1990   4   in 1991  
Minimum Dew Point   23   16   20   +3   41   in 1996   -14   in 1979  
Average  Dew Point   25   29   27   -2   45   in 1996   0   in 1979  
 Month Avg Max Dew Point   38.2   42.9   35.7   +2.5   48.5   in 2015   17.9   in 1989  
Month Avg Min Dew Point   25.1   23.6   20.5   +4.5   36.2   in 2015   -0.2   in 1989  
Month Average Dew Point   31.9   33.4   28.1   +3.8   42.5   in 2015   8.9   in 1989  
Precipitation   .00   .10   .15   -.15   1.95   in 1986            
One Hour   .00   .06           .41   in 1986            
Hourly Rate   .00   .26           .36   in 2007            
Month Precipitation   3.55   .97   2.86   +.69   7.88   in 1936   .27   in 1998  
Year Precipitation   41.36   46.55   44.29   -2.93   63.81   in 1983   27.14   in 1965  
Snow   0.0   0.0   0.2   -0.2   8.8   in 2008       in    
Snow Depth   0   0           18   in 1904       in    
Month Snow   1.5   0.2   3.4   -1.9   21.3   in 1981   0.0   in 2015  
Season Snow   1.5   0.2   4.0   -2.5   21.3   in 1981   0.0   in 2015  
    December 19, 2022     Record Record
Observed Daily Data   2022   2021   Norm   Depart   Highest Lowest
Maximum Humidity   78%   98%   83%   -5%   100%   in 2001   57%   in 1978  
Minimum Humidity   55%   67%   54%   +1%   96%   in 1993   33%   in 2009  
Average Humidity   67%   83%   69%   -2%   98%   in 1993   46%   in 1978  
Maximum Barometer   30.19   30.20   30.17   +00.02   30.74   in 1991   29.68   in 1963  
Minimum Barometer   29.96   29.74   29.84   +00.12   30.46   in 1964   29.25   in 1969  
Average Barometer   30.08   29.97   30.00   +00.07   30.55   in 1964   29.51   in 1986  
Average Wind   12.0   10.5   8.3   +3.8   18.5   in 1977   3.0   in 2007  
Direction   NW   NNW   WNW       NE E
High Wind Gust   32   30   26   +6   49   in 1986   13   in 2020  
Direction   NW   N   NW       ENE NNW
Maximum Water Temp   46.0   48.9   45.5   +0.5   50.4   in 2006   40.6   in 2018  
Minimum Water Temp   43.7   45.9   42.7   +1.0   48.7   in 2015   37.9   in 2018  
Average Water Temp   44.9   47.4   44.1   +0.7   49.5   in 2015   39.3   in 2018  
Sunrise/ AM Twilight   7:07:10 AM   6:37:33 AM            
Sunset / PM Twilight   4:17:14 PM   4:47:07 PM            
Length Of Day   9:10:04                          
Special Conditions   None                              
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