Portsmouth Rhode Island Weather Almanac  
Saturday, December 9, 2023  
Partly Cloudy early, Mostly Cloudy Day to Cloudy & Fog PM, Light Winds, Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    December 9, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   52   45   45   +7   65   in 1991   12   in 1902  
Minimum Temperature   37   32   32   +5   47   in 1923   -4   in 1902  
Average Temperature   45   39   38   +7   55   in 1991   4   in 1902  
 Month Avg Max Temperature   46.0   50.2   45.8   +0.2   56.3   in 1998   32.8   in 1910  
Month Avg Min Temperature   35.1   36.7   32.8   +2.3   43.3   in 1998   14.8   in 1989  
Month Average Temperature   40.8   43.7   39.1   +1.7   50.0   in 1998   25.0   in 1989  
High Heat Index                   #N/A   in #N/A            
Low Wind Chill   37   23   20   +17             -12   in 1902  
Heating Degree Days   20   26   27   -7   61   in 1902   10   in 1991  
Month Heating DD   218   192   233   -15   360   in 1989   135   in 1998  
Season Heating DD   1159   1013   1223   -64   1646   in 1904   947   in 2011  
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   49   30   37   +12   57   in 2019   6   in 1989  
Minimum Dew Point   36   10   23   +13   43   in 1966   -10   in 1968  
Average  Dew Point   43   20   30   +13   48   in 2019   -1   in 1989  
 Month Avg Max Dew Point   40.6   44.6   37.4   +3.2   48.3   in 1982   19.2   in 1989  
Month Avg Min Dew Point   31.7   28.7   22.6   +9.1   35.6   in 2001   -3.8   in 1989  
Month Average Dew Point   36.3   36.8   30.0   +6.4   41.4   in 2001   7.7   in 1989  
Precipitation   .00   .00   .15   -.15   1.94   in 2019            
One Hour Rain   .00   .00           .32   in 2009            
Half Hour Rain   .00   .00           .18   in 2019            
Hourly Rain Rate   .00   .00           1.48   in 2019            
Month Precipitation   .94   1.83   1.35   -.41   4.37   in 1996   .00   in 1988  
Year Precipitation   49.99   39.64   42.78   +7.21   61.79   in 1983   25.40   in 1957  
Snow   0.0   0.0   0.2   -0.2   2.7   in 1958            
Snow Depth   0   0   0   -0   13   in 1981            
Month Snow   0.1   0.0   1.4   -1.3   17.0   in 1981   0.0   in 2022  
Season Snow   0.1   0.0   2.0   +2.0   19.5   in 1898   0.0   in 2022  
    December 9, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   79%   88%   +11%   100%   in 2013   52%   in 1989  
Minimum Humidity   84%   25%   57%   +27%   96%   in 2014   23%   in 1989  
Average Humidity   92%   52%   73%   +19%   98%   in 2014   38%   in 1989  
Maximum Barometer   30.29   30.25   30.21   +00.08   30.74   in 1936   29.43   in 1981  
Minimum Barometer   30.12   30.17   29.86   +00.26   30.31   in 2007   29.18   in 2009  
Average Barometer   30.21   30.21   30.04   +00.17   30.44   in 2002   29.36   in 1981  
Average Wind   4.9   11.8   7.3   -2.4   13.5   in 1981   0.7   in 1997  
Direction   S   N   WNW       NW NNW
High Wind Gust   20   24   25   -5   62   in 2005   7   in 1997  
Direction   SSE   N   NNW       NNW NW
Maximum Water Temp   49.8   49.8   47.3   +2.5   52.2   in 2011   42.2   in 2010  
Minimum Water Temp   46.2   46.9   44.4   +1.8   50.1   in 2011   38.9   in 2002  
Average Water Temp   48.0   48.4   45.9   +2.1   51.2   in 2011   41.0   in 2010  
Sunrise/ AM Twilight   6:59:38 AM   6:30:31 AM            
Sunset / PM Twilight   4:14:53 PM   4:44:29 PM            
Length Of Day   9:15:15                          
Special Conditions   Fog                                  
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Hour-by-Hour Weather For December 9, 2023            
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