Portsmouth Rhode Island Weather Almanac  
Friday, December 30, 2022  
Partly Cloudy early then Clear and Continued Warm  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2022
    December 30, 2022   Record   Record  
Observed Daily Data   2022   2021   Norm   Depart   Highest   Lowest  
Maximum Temperature   55   45   40   +15   60   in 1984   5   in 1917  
Minimum Temperature   39   40   27   +12   48   in 1948   -10   in 1917  
Average Temperature   47   43   33   +14   52   in 1948   -3   in 1917  
 Month Avg Max Temperature   42.6   46.1   43.3   -0.7   54.1   in 2015   30.3   in 1989  
Month Avg Min Temperature   29.8   33.9   30.1   -0.3   41.5   in 2015   14.3   in 1989  
Month Average Temperature   36.4   40.3   36.7   -0.2   48.1   in 2015   22.5   in 1989  
High Heat Index                                      
Low Wind Chill   37   36   16   +21             -27   in 1917  
Heating Degree Days   18   22   32   -14   68   in 1917   13   in 1948  
Month HDD   857   742   848   +9   1276   in 1989   507   in 2015  
Season HDD   1678   1536   1838   -160   2448   in 1904   1302   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   45   44   33   +12   53   in 1984   -3   in 1987  
Minimum Dew Point   35   34   17   +18   42   in 1990   -16   in 1962  
Average  Dew Point   40   39   25   +15   47   in 1990   -7   in 1987  
 Month Avg Max Dew Point   35.4   40.1   34.1   +1.3   49.4   in 2015   15.6   in 1989  
Month Avg Min Dew Point   21.9   22.8   18.5   +3.4   36.1   in 2015   -0.7   in 1989  
Month Average Dew Point   28.9   31.6   26.3   +2.6   43.0   in 2015   7.4   in 1989  
Precipitation   .00   .02   .13   -.13   1.98   in 2019            
One Hour   .00   .01           .39   in 2000            
Hourly Rate   .00   .00           .62   in 2019            
Month Precipitation   4.66   1.69   4.40   +.26   9.45   in 1936   .58   in 1955  
Year Precipitation   42.47   47.27   45.83   -3.36   65.49   in 1983   27.66   in 1965  
Snow   0.0   0.0   0.3   -0.3   5.8   in 1993       in    
Snow Depth   0   0           15   in 1947       in    
Month Snow   1.5   0.8   6.2   -4.7   22.3   in 1904   T   in 2011  
Season Snow   1.5   0.8   6.8   -5.3   23.7   in 1904   T   in 1999  
    December 30, 2022     Record Record
Observed Daily Data   2022   2021   Norm   Depart   Highest Lowest
Maximum Humidity   96%   99%   85%   +11%   100%   in 2005   38%   in 1949  
Minimum Humidity   52%   80%   53%   -1%   96%   in 1992   16%   in 1994  
Average Humidity   74%   90%   69%   +5%   98%   in 1992   30%   in 1994  
Maximum Barometer   30.30   30.01   30.15   +00.15   30.68   in 2006   29.33   in 1997  
Minimum Barometer   30.20   29.92   29.82   +00.38   30.40   in 1972   28.89   in 1997  
Average Barometer   30.25   29.97   29.98   +00.27   30.50   in 1978   29.11   in 1997  
Average Wind   6.1   2.6   8.5   -2.4   25.7   in 1962   2.2   in 2004  
Direction   SSW   ENE   NW       NW N
High Wind Gust   20   11   26   -6   70   in 1962   11   in 2021  
Direction   SSW   NNW   NW       NW NNW
Maximum Water Temp   43.5   48.6   43.3   +0.2   48.9   in 2006   37.8   in 2017  
Minimum Water Temp   41.9   46.2   40.8   +1.1   46.3   in 2015   33.6   in 2017  
Average Water Temp   42.7   47.4   42.1   +0.6   47.4   in 2021   35.7   in 2017  
Sunrise/ AM Twilight   7:11:24 AM   6:41:48 AM            
Sunset / PM Twilight   4:24:00 PM   4:53:50 PM            
Length Of Day   9:12:36                          
Special Conditions   Fog                                  
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