Portsmouth Rhode Island Weather Almanac  
Thursday, December 28, 2023  
Cloudy, Heavy Rain and Fog, Windy, Continued Very Warm  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    December 28, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   49   43   41   +8   56   in 2011   15   in 2017  
Minimum Temperature   42   25   27   +15   43   in 2008   3   in 1896  
Average Temperature   46   34   34   +12   48   in 2008   12   in 2017  
 Month Avg Max Temperature   47.3   41.9   43.5   +3.8   54.8   in 2015   30.4   in 1989  
Month Avg Min Temperature   34.9   29.2   30.4   +4.5   42.3   in 2015   14.1   in 1989  
Month Average Temperature   41.3   35.8   36.9   +4.4   48.9   in 2015   22.5   in 1989  
High Heat Index                   #N/A   in #N/A            
Low Wind Chill   35   22   16   +19             -11   in 1952  
Heating Degree Days   19   31   31   -12   53   in 2017   17   in 2008  
Month Heating DD   663   818   785   -122   1191   in 1989   452   in 2015  
Season Heating DD   1604   1639   1775   -171   2375   in 1904   1247   in 2015  
Cooling Degree Days   0   0   0   +0       in     0   in Many  
Month Cooling DD   0   0   0   +0   3   in 2022   0   in Many  
Year Cooling DD   726   784   609   +117   871   in 2020   290   in 1902  
Maximum Dew Point   48   36   33   +15   54   in 2018   2   in 2017  
Minimum Dew Point   41   18   18   +23   41   in 2023   -9   in 2017  
Average  Dew Point   45   27   25   +20   45   in 2023   -4   in 2017  
 Month Avg Max Dew Point   40.7   34.9   34.4   +6.3   49.8   in 2015   15.1   in 1989  
Month Avg Min Dew Point   29.3   21.1   18.9   +10.4   36.8   in 2015   -1.3   in 1989  
Month Average Dew Point   35.3   28.3   26.6   +8.6   43.5   in 2015   6.9   in 1989  
Precipitation   .90   .00   .14   +.76   2.75   in 1967            
One Hour Rain   .15   .00           .41   in 1967            
Half Hour Rain   .11   .00           .14   in 2018            
Hourly Rain Rate   .45   .00           2.17   in 2011            
Month Precipitation   5.59   4.66   4.14   +1.45   9.28   in 1936   .56   in 1955  
Year Precipitation   54.64   42.47   45.57   +9.07   65.49   in 1983   27.66   in 1965  
Snow   0.0   0.0   0.3   -0.3   5.6   in 1990            
Snow Depth   0   0   1   -1   15   in 1947            
Month Snow   0.1   1.5   5.6   -5.5   21.7   in 1981   0.0   in 2015  
Season Snow   0.1   0.1   6.2   +6.2   22.9   in 1904   0.0   in 2015  
    December 28, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   82%   85%   +14%   100%   in 2018   46%   in 1952  
Minimum Humidity   98%   65%   56%   +42%   98%   in 2023   18%   in 2003  
Average Humidity   99%   74%   70%   +28%   99%   in 2023   44%   in 1991  
Maximum Barometer   29.92   30.34   30.17   -00.25   30.78   in 1992   29.63   in 1976  
Minimum Barometer   29.63   30.25   29.86   -00.23   30.58   in 1992   29.20   in 1969  
Average Barometer   29.78   30.30   30.02   -00.24   30.68   in 1992   29.44   in 1969  
Average Wind   13.5   5.4   8.0   +5.5   17.6   in 1969   2.7   in 1958  
Direction   N   SW   NW       NW SSW
High Wind Gust   29   27   26   +3   53   in 1969   9   in 2003  
Direction   N   SW   WNW       NW N
Maximum Water Temp   48.2   42.4   43.8   +4.4   50.4   in 2015   38.8   in 2010  
Minimum Water Temp   47.5   39.6   41.4   +6.1   47.5   in 2023   34.9   in 2000  
Average Water Temp   47.9   41.0   42.6   +5.3   48.7   in 2015   37.5   in 2017  
Sunrise/ AM Twilight   7:10:53 AM   6:41:20 AM            
Sunset / PM Twilight   4:22:18 PM   4:52:22 PM            
Length Of Day   9:11:25                          
Special Conditions   Fog                                  
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