Portsmouth Rhode Island Weather Almanac  
Thursday, December 29, 2022  
Clear early, Partly Cloudy Day to Clear PM, Much Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2022
    December 29, 2022   Record   Record  
Observed Daily Data   2022   2021   Norm   Depart   Highest   Lowest  
Maximum Temperature   50   42   40   +10   58   in 1984   14   in 1917  
Minimum Temperature   38   36   27   +11   47   in 1984   -8   in 1917  
Average Temperature   44   39   34   +10   53   in 1984   3   in 1917  
 Month Avg Max Temperature   42.2   46.2   43.4   -1.2   54.3   in 2015   30.3   in 1989  
Month Avg Min Temperature   29.5   33.7   30.2   -0.8   41.9   in 2015   14.1   in 1989  
Month Average Temperature   36.1   40.2   36.8   -0.7   48.4   in 2015   22.4   in 1989  
High Heat Index                                      
Low Wind Chill   34   32   17   +17             -23   in 1917  
Heating Degree Days   21   26   31   -10   62   in 1917   12   in 1984  
Month HDD   839   720   816   +23   1234   in 1989   480   in 2015  
Season HDD   1660   1514   1806   -146   2412   in 1904   1275   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   39   37   33   +6   53   in 2018   2   in 2017  
Minimum Dew Point   30   33   17   +13   45   in 1984   -9   in 1993  
Average  Dew Point   35   35   25   +10   48   in 2005   -1   in 2017  
 Month Avg Max Dew Point   35.0   40.0   34.2   +0.8   49.6   in 2015   15.2   in 1989  
Month Avg Min Dew Point   21.4   22.4   18.7   +2.7   36.3   in 2015   -1.2   in 1989  
Month Average Dew Point   28.5   31.4   26.5   +2.0   43.2   in 2015   7.0   in 1989  
Precipitation   .00   .01   .13   -.13   1.89   in 1901            
One Hour   .00   .01           .35   in 2013            
Hourly Rate   .00   .00           1.92   in 2005            
Month Precipitation   4.66   1.67   4.27   +.39   9.28   in 1936   .58   in 1955  
Year Precipitation   42.47   47.25   45.70   -3.23   65.49   in 1983   27.66   in 1965  
Snow   0.0   0.0   0.3   -0.3   8.3   in 1945       in    
Snow Depth   0   0           15   in 1947       in    
Month Snow   1.5   0.8   5.9   -4.4   21.7   in 1981   T   in 2011  
Season Snow   1.5   0.8   6.5   -5.0   22.9   in 1904   T   in 1999  
    December 29, 2022     Record Record
Observed Daily Data   2022   2021   Norm   Depart   Highest Lowest
Maximum Humidity   91%   93%   86%   +5%   100%   in 2018   54%   in 1952  
Minimum Humidity   61%   79%   57%   +4%   95%   in 1990   17%   in 1994  
Average Humidity   76%   86%   71%   +5%   98%   in 1990   39%   in 1949  
Maximum Barometer   30.34   30.02   30.15   +00.19   30.82   in 1933   29.49   in 1976  
Minimum Barometer   30.23   29.85   29.76   +00.47   30.43   in 2006   28.86   in 1956  
Average Barometer   30.29   29.94   29.96   +00.33   30.57   in 2006   29.34   in 1976  
Average Wind   6.3   2.9   8.0   -1.7   17.9   in 2009   1.5   in 1992  
Direction   WSW   N   WNW       NW NNE
High Wind Gust   23   11   26   -3   47   in 2009   7   in 1992  
Direction   SSW   N   NW       NW NW
Maximum Water Temp   42.6   47.8   43.8   -1.2   49.0   in 2006   39.0   in 2010  
Minimum Water Temp   41.0   46.0   41.1   -0.1   46.6   in 2015   34.3   in 2017  
Average Water Temp   41.8   46.9   42.4   -0.6   47.4   in 2015   37.2   in 2017  
Sunrise/ AM Twilight   7:11:12 AM   6:41:35 AM            
Sunset / PM Twilight   4:23:14 PM   4:53:05 PM            
Length Of Day   9:12:02                          
Special Conditions   None                              
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