Portsmouth Rhode Island Weather Almanac  
Saturday, December 17, 2022  
Cloudy, Light Rain & Fog early, Mostly Cloudy Day to Partly Cloudy PM, Windy and Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2022
    December 17, 2022   Record   Record  
Observed Daily Data   2022   2021   Norm   Depart   Highest   Lowest  
Maximum Temperature   44   59   43   +1   59   in 2021   18   in 1932  
Minimum Temperature   35   43   30   +5   44   in 1996   -1   in 1942  
Average Temperature   40   51   36   +4   51   in 2021   10   in 1919  
 Month Avg Max Temperature   44.7   50.5   44.8   -0.1   54.6   in 2015   30.5   in 1904  
Month Avg Min Temperature   33.5   36.4   31.7   +1.8   42.0   in 2015   16.5   in 1989  
Month Average Temperature   39.4   43.6   38.1   +1.2   48.6   in 2015   24.8   in 1904  
High Heat Index                                      
Low Wind Chill   27   40   17   +10             -12   in 1942  
Heating Degree Days   25   14   29   -4   55   in 1919   14   in 2021  
Month HDD   436   363   456   -20   683   in 1904   279   in 2015  
Season HDD   1257   1157   1446   -189   1995   in 1904   1074   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   43   51   36   +7   58   in 1973   2   in 1951  
Minimum Dew Point   28   19   20   +8   43   in 1996   -12   in 1979  
Average  Dew Point   36   35   28   +8   48   in 1996   -2   in 1951  
 Month Avg Max Dew Point   39.4   43.1   36.0   +3.3   49.1   in 2015   18.4   in 1989  
Month Avg Min Dew Point   25.3   23.9   20.9   +4.4   37.6   in 2015   -0.8   in 1989  
Month Average Dew Point   32.6   33.7   28.5   +4.1   43.5   in 2015   8.8   in 1989  
Precipitation   .04   .00   .15   -.11   3.13   in 1973            
One Hour   .01   .00           .95   in 2000            
Hourly Rate   .00   .00           .67   in 2015            
Month Precipitation   3.55   .71   2.56   +.99   7.74   in 1936   .27   in 1998  
Year Precipitation   41.36   46.29   43.99   -2.63   63.81   in 1983   27.14   in 1965  
Snow   0.0   0.0   0.2   -0.2   6.1   in 2020       in    
Snow Depth   0   0           12   in 1904       in    
Month Snow   1.5   0.2   3.0   -1.5   20.6   in 1981   0.0   in 2015  
Season Snow   1.5   0.2   3.6   -2.1   21.1   in 1898   0.0   in 2015  
    December 17, 2022     Record Record
Observed Daily Data   2022   2021   Norm   Depart   Highest Lowest
Maximum Humidity   99%   92%   86%   +13%   100%   in 2016   60%   in 2009  
Minimum Humidity   69%   22%   56%   +13%   94%   in 1996   22%   in 2021  
Average Humidity   84%   57%   71%   +13%   97%   in 1996   50%   in 1953  
Maximum Barometer   29.76   30.15   30.12   -00.36   30.68   in 1899   29.64   in 1976  
Minimum Barometer   29.39   29.80   29.76   -00.37   30.32   in 1949   28.93   in 1970  
Average Barometer   29.58   29.98   29.94   -00.37   30.42   in 1949   29.39   in 1973  
Average Wind   12.3   8.5   8.5   +3.8   19.7   in 2000   1.2   in 1962  
Direction   WNW   WNW   WNW       SSE NNE
High Wind Gust   29   30   26   +3   53   in 2000   10   in 1962  
Direction   WNW   WSW   WNW       WSW NNW
Maximum Water Temp   49.1   49.8   45.9   +3.2   52.3   in 2011   41.3   in 2013  
Minimum Water Temp   46.9   49.3   43.5   +3.4   49.6   in 2015   38.4   in 2010  
Average Water Temp   48.0   49.6   44.7   +3.3   50.5   in 2011   40.2   in 2013  
Sunrise/ AM Twilight   7:05:57 AM   6:36:22 AM            
Sunset / PM Twilight   4:16:28 PM   4:46:17 PM            
Length Of Day   9:10:31                          
Special Conditions   Fog                                  
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Hour-by-Hour Weather For December 17, 2022            
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