Portsmouth Rhode Island Weather Almanac  
Saturday, December 31, 2022  
Mostly Cloudy early then Cloudy, Rain and Fog, Very Warm  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2022
    December 31, 2022   Record   Record  
Observed Daily Data   2022   2021   Norm   Depart   Highest   Lowest  
Maximum Temperature   56   48   40   +16   57   in 1936   9   in 1962  
Minimum Temperature   44   41   27   +17   44   in 2022   -5   in 1917  
Average Temperature   50   45   33   +17   50   in 2022   3   in 1962  
 Month Avg Max Temperature   43.0   46.2   43.2   -0.2   54.0   in 2015   30.8   in 1989  
Month Avg Min Temperature   30.3   34.1   30.0   +0.2   41.4   in 2015   14.6   in 1989  
Month Average Temperature   36.9   40.4   36.5   +0.3   48.0   in 2015   22.9   in 1989  
High Heat Index                                      
Low Wind Chill   42   41   14   +28             -26   in 1962  
Heating Degree Days   15   20   32   -17   62   in 1962   15   in 2022  
Month HDD   872   762   880   -8   1304   in 1989   527   in 2015  
Season HDD   1693   1556   1870   -177   2476   in 1904   1322   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   55   48   33   +22   55   in 2022   -5   in 1962  
Minimum Dew Point   44   41   17   +27   44   in 2022   -18   in 1962  
Average  Dew Point   50   45   25   +25   50   in 2022   -12   in 1962  
 Month Avg Max Dew Point   36.0   40.4   33.9   +2.1   49.3   in 2015   16.6   in 1989  
Month Avg Min Dew Point   22.6   23.4   18.4   +4.2   35.9   in 2015   0.1   in 1989  
Month Average Dew Point   29.5   32.1   26.2   +3.4   42.8   in 2015   8.3   in 1989  
Precipitation   .58   .05   .13   +.45   1.37   in 1906            
One Hour   .10   .02           .18   in 1989            
Hourly Rate   .22   .15           .64   in 2018            
Month Precipitation   5.24   1.74   4.53   +.71   9.94   in 1936   .58   in 1955  
Year Precipitation   43.05   47.32   45.96   -2.91   65.49   in 1983   27.66   in 1965  
Snow   0.0   0.0   0.3   -0.3   5.1   in 2008       in    
Snow Depth   0   0           15   in 1947       in    
Month Snow   1.5   0.8   6.5   -5.0   23.5   in 2009   T   in 2011  
Season Snow   1.5   0.8   7.1   -5.6   23.7   in 1904   T   in 1999  
    December 31, 2022     Record Record
Observed Daily Data   2022   2021   Norm   Depart   Highest Lowest
Maximum Humidity   99%   100%   85%   +14%   100%   in 2021   57%   in 1955  
Minimum Humidity   95%   97%   55%   +40%   97%   in 2021   22%   in 1991  
Average Humidity   97%   99%   70%   +27%   99%   in 2021   41%   in 1991  
Maximum Barometer   30.20   29.99   30.18   +00.02   30.76   in 1991   29.59   in 1976  
Minimum Barometer   29.72   29.93   29.89   -00.17   30.59   in 1963   28.94   in 1948  
Average Barometer   29.96   29.96   30.03   -00.07   30.67   in 1963   29.47   in 1962  
Average Wind   5.2   2.2   7.5   -2.3   23.9   in 1962   1.3   in 1963  
Direction   SSW   SE   NW       NW NW
High Wind Gust   17   11   24   -7   57   in 1901   10   in 1967  
Direction   #N/A   #N/A   WNW       NW NW
Maximum Water Temp   44.2   48.4   43.1   +1.1   49.2   in 2011   38.1   in 2000  
Minimum Water Temp   43.0   46.9   40.7   +2.3   47.4   in 2015   34.5   in 2017  
Average Water Temp   43.6   47.7   41.9   +1.7   47.7   in 2021   36.5   in 2017  
Sunrise/ AM Twilight   7:11:34 AM   6:42:00 AM            
Sunset / PM Twilight   4:24:49 PM   4:54:38 PM            
Length Of Day   9:13:15                          
Special Conditions   Dense Fog                              
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