Portsmouth Rhode Island Weather Almanac  
Thursday, December 15, 2022  
Partly Cloudy early then Mostly Cloudy and Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2022
    December 15, 2022   Record   Record  
Observed Daily Data   2022   2021   Norm   Depart   Highest   Lowest  
Maximum Temperature   41   52   44   -3   61   in 2015   24   in 2010  
Minimum Temperature   30   31   30   +0   48   in 2015   9   in 1900  
Average Temperature   36   42   37   -1   55   in 2015   18   in 1900  
 Month Avg Max Temperature   44.7   49.5   45.0   -0.3   54.8   in 2015   30.1   in 1904  
Month Avg Min Temperature   32.9   35.1   31.9   +1.0   42.3   in 2015   16.1   in 1989  
Month Average Temperature   39.1   42.5   38.4   +0.7   48.9   in 2015   24.6   in 1904  
High Heat Index                                      
Low Wind Chill   22   28   19   +3             -4   in 1980  
Heating Degree Days   29   23   28   +1   47   in 1900   10   in 2015  
Month HDD   389   338   398   -9   606   in 1904   242   in 2015  
Season HDD   1210   1132   1388   -178   1918   in 1904   1037   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   40   47   36   +4   60   in 2015   10   in 2010  
Minimum Dew Point   25   15   21   +4   43   in 2008   -5   in 2016  
Average  Dew Point   33   31   28   +5   50   in 2015   4   in 1961  
 Month Avg Max Dew Point   38.8   41.9   36.3   +2.5   49.1   in 2015   18.0   in 1989  
Month Avg Min Dew Point   24.2   22.7   21.3   +2.9   38.0   in 2015   -1.5   in 1989  
Month Average Dew Point   31.7   32.5   28.8   +2.9   43.7   in 2015   8.3   in 1989  
Precipitation   T   .01   .15   +.00   1.79   in 1981            
One Hour   T   .01           .60   in 1987            
Hourly Rate   .00   .00           .42   in 2013            
Month Precipitation   1.96   .69   2.26   -.30   6.64   in 1936   .20   in 1998  
Year Precipitation   39.77   46.27   43.69   -3.92   63.81   in 1983   27.09   in 1965  
Snow   0.0   0.0   0.2   -0.2   7.1   in 1905       in    
Snow Depth   0   0           11   in 1904       in    
Month Snow   1.5   0.2   2.6   -1.1   19.9   in 1981   0.0   in 2015  
Season Snow   1.5   0.2   3.2   -1.7   21.1   in 1898   0.0   in 2015  
    December 15, 2022     Record Record
Observed Daily Data   2022   2021   Norm   Depart   Highest Lowest
Maximum Humidity   97%   85%   86%   +11%   100%   in 2018   49%   in 1961  
Minimum Humidity   75%   42%   57%   +18%   96%   in 1993   17%   in 1959  
Average Humidity   86%   64%   71%   +15%   98%   in 1993   42%   in 1961  
Maximum Barometer   30.27   30.70   30.14   +00.13   30.70   in 2021   29.24   in 1954  
Minimum Barometer   30.06   30.26   29.81   +00.25   30.46   in 1994   29.05   in 1968  
Average Barometer   30.17   30.48   29.98   +00.19   30.51   in 1994   29.16   in 1954  
Average Wind   8.2   5.8   8.7   -0.5   19.1   in 1961   2.6   in 2014  
Direction   NNW   SSE   WNW       NNW WNW
High Wind Gust   22   25   27   -5   53   in 1953   11   in 1992  
Direction   NNE   S   WNW       WSW WSW
Maximum Water Temp   46.0   48.2   46.2   -0.2   51.9   in 2015   41.5   in 1997  
Minimum Water Temp   42.6   46.2   43.6   -1.0   50.7   in 2015   38.7   in 2010  
Average Water Temp   44.3   47.2   44.9   -0.6   51.3   in 2015   40.1   in 1997  
Sunrise/ AM Twilight   7:04:36 AM   6:35:03 AM            
Sunset / PM Twilight   4:15:50 PM   4:45:36 PM            
Length Of Day   9:11:14                          
Special Conditions   None                              
Comments   Abnormally Dry  
Hour-by-Hour Weather For December 15, 2022            
Climate Weather for December 15            
Weather History For December 15            
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