Portsmouth Rhode Island Weather Almanac  
Saturday, September 16, 2023  
Cloudy, Rainy Morning then Partly Cloudy PM, Gusty Winds from Hurricane Lee, Continued Cool  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    September 16, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   70   71   72   -2   87   in 1941   57   in 1954  
Minimum Temperature   58   50   57   +1   70   in 1915   44   in 1988  
Average Temperature   64   61   65   -1   78   in 1915   54   in 1984  
 Month Avg Max Temperature   80.5   75.6   74.3   +6.3   81.9   in 1961   68.6   in 1917  
Month Avg Min Temperature   65.3   60.1   59.4   +5.9   65.8   in 1961   52.8   in 1893  
Month Average Temperature   73.1   68.0   66.8   +6.3   74.0   in 1961   61.5   in 1963  
High Heat Index   69   68   72   -3   92   in 1991            
Low Wind Chill                             42   in 1984  
Heating Degree Days   1   4   2   -1   11   in 1984   0   in 2021  
Month Heating DD   5   7   20   -15   79   in 1913   0   in 2015  
Season Heating DD   5   7   20   -15   95   in 1914   0   in 2015  
Cooling Degree Days   0   0   2   -2   13   in 1915   0   in 2023  
Month Cooling DD   135   55   49   +86   148   in 1961   7   in 1975  
Year Cooling DD   707   766   586   +121   837   in 2020   280   in 1902  
Maximum Dew Point   56   52   63   -7   73   in 1999   43   in 1966  
Minimum Dew Point   53   44   53   +0   68   in 2005   32   in 1984  
Average  Dew Point   55   48   58   -3   70   in 2005   39   in 1984  
 Month Avg Max Dew Point   71.5   65.0   64.3   +7.2   71.5   in 2023   55.2   in 1967  
Month Avg Min Dew Point   63.3   55.8   54.9   +8.3   63.3   in 2023   44.3   in 1967  
Month Average Dew Point   67.6   60.8   59.6   +8.0   67.6   in 2023   49.7   in 1967  
Precipitation   .20   .00   .14   +.06   6.20   in 1932            
One Hour Rain   .06   .00           .79   in 2021            
Half Hour Rain   .03   .00           .77   in 2021            
Hourly Rain Rate   .08   .00           8.35   in 2021            
Month Precipitation   2.48   3.23   1.91   +.57   8.49   in 2021   T   in 1983  
Year Precipitation   38.10   28.65   31.19   +6.91   46.35   in 1998   17.49   in 1957  
Snow                                      
Snow Depth                                      
Month Snow                                      
Season Snow   0.0   0.0   0.0   +0.0   0.0   in 1996   0.0   in 1998  
    September 16, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   88%   84%   93%   -5%   100%   in 2017   81%   in 2011  
Minimum Humidity   59%   39%   59%   +0%   95%   in 2004   34%   in 1984  
Average Humidity   74%   62%   76%   -2%   98%   in 2004   59%   in 1984  
Maximum Barometer   29.83   30.20   30.14   -00.31   30.54   in 1988   29.72   in 1953  
Minimum Barometer   29.69   30.10   29.93   -00.24   30.27   in 2016   29.20   in 1999  
Average Barometer   29.76   30.15   30.04   -00.28   30.36   in 1988   29.63   in 1999  
Average Wind   12.6   5.4   5.9   +6.7   17.3   in 1999   1.3   in 2006  
Direction   WNW   NNW   WNW       ENE N
High Wind Gust   33   19   21   +12   45   in 1999   11   in 2006  
Direction   WNW   NW   WNW       SE WNW
Maximum Water Temp   70.0   71.6   68.5   +1.5   71.6   in 2021   65.8   in 2007  
Minimum Water Temp   69.1   69.8   66.8   +2.3   70.2   in 1999   64.2   in 2001  
Average Water Temp   69.6   70.7   67.7   +1.9   70.7   in 2021   65.1   in 2007  
Sunrise/ AM Twilight   6:26:08 AM   5:59:21 AM            
Sunset / PM Twilight   6:53:00 PM   7:20:32 PM            
Length Of Day   12:26:52                          
Special Conditions   None                                  
Comments   Hurricane Lee passes to the east of Rhode Island  
Hour-by-Hour Weather For September 16, 2023            
Climate Weather for September 16            
Weather History For September 16            
Weather Calendar            
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