Portsmouth Rhode Island Weather Almanac  
Sunday, September 18, 2022  
Clear to Partly Cloudy PM, Breezy, Humid, Much Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2022
    September 18, 2022   Record   Record  
Observed Daily Data   2022   2021   Norm   Depart   Highest   Lowest  
Maximum Temperature   78   74   71   +7   84   in 1914   58   in 1996  
Minimum Temperature   63   64   57   +6   68   in 2016   41   in 1990  
Average Temperature   71   69   64   +7   74   in 2016   52   in 1990  
 Month Avg Max Temperature   75.4   75.8   73.9   +1.4   80.9   in 1983   68.4   in 1917  
Month Avg Min Temperature   59.7   61.9   59.1   +0.6   64.6   in 1915   52.8   in 1975  
Month Average Temperature   67.7   69.2   66.5   +1.2   72.4   in 1961   61.4   in 1963  
High Heat Index   80   70   72   +8   89   in 1992            
Low Wind Chill                             36   in 1990  
Heating Degree Days   0   0   3   -3   13   in 1990   0   in 2022  
Month HDD   12   1   26   -14   85   in 1913   0   in 2015  
Season HDD   12   1   33   -21   85   in 1913   0   in 2015  
Cooling Degree Days   6   4   2   +4   9   in 2016   0   in 2020  
Month CDD   61   76   53   +8   148   in 1961   7   in 1975  
Year CDD   765   759   590   +175   840   in 2020   280   in 1902  
Maximum Dew Point   70   68   62   +8   73   in 2018   41   in 1990  
Minimum Dew Point   59   62   52   +7   67   in 2018   32   in 1959  
Average  Dew Point   65   65   57   +8   70   in 2018   37   in 1990  
 Month Avg Max Dew Point   64.9   67.3   64.1   +0.9   69.2   in 2018   55.2   in 1975  
Month Avg Min Dew Point   55.5   58.2   54.6   +0.9   61.3   in 2018   44.4   in 1984  
Month Average Dew Point   60.6   63.0   59.3   +1.3   65.5   in 2018   49.9   in 1984  
Precipitation   .00   .00   .14   -.14   2.85   in 1936            
One Hour   .00   .00           .69   in 2004            
Hourly Rate   .00   .00           3.49   in 2018            
Month Precipitation   3.23   8.56   2.19   +1.04   8.56   in 2021   .06   in 1946  
Year Precipitation   28.65   37.66   31.47   -2.82   46.35   in 1998   17.53   in 1957  
Snow   #N/A   #N/A   0.0   #N/A       in         in    
Snow Depth   #N/A   #N/A               in         in    
Month Snow   0.0   0.0   0.0   +0.0       in         in    
Season Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in #N/A  
    September 18, 2022     Record Record
Observed Daily Data   2022   2021   Norm   Depart   Highest Lowest
Maximum Humidity   97%   99%   94%   +3%   100%   in 2018   78%   in 1968  
Minimum Humidity   68%   80%   61%   +7%   96%   in 1993   35%   in 1968  
Average Humidity   83%   90%   77%   +5%   98%   in 1993   57%   in 1968  
Maximum Barometer   30.17   30.12   30.14   +00.03   30.65   in 1947   29.66   in 1996  
Minimum Barometer   29.93   29.95   29.93   +00.00   30.39   in 1985   29.38   in 1996  
Average Barometer   30.05   30.04   30.03   +00.02   30.42   in 2011   29.52   in 1996  
Average Wind   7.5   5.6   6.0   +1.5   12.6   in 2004   1.2   in 2001  
Direction   SSW   NNE   NNE       N NW
High Wind Gust   29   18   21   +8   38   in 2004   10   in 1951  
Direction   SSW   NNE   SSW       N SW
Maximum Water Temp   71.1   70.9   68.2   +2.9   71.2   in 2015   64.0   in 1996  
Minimum Water Temp   68.7   69.5   66.1   +2.6   69.6   in 2018   62.6   in 2013  
Average Water Temp   69.9   70.2   67.1   +2.8   70.3   in 2018   63.5   in 1996  
Sunrise/ AM Twilight   6:28:25 AM   6:01:26 AM            
Sunset / PM Twilight   6:49:08 PM   7:17:01 PM            
Length Of Day   12:20:43                          
Special Conditions   None                              
Comments   Moderate Drought  
Hour-by-Hour Weather For September 18, 2022            
Climate Weather for September 18            
Weather History For September 18            
Weather Calendar            
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