Portsmouth Rhode Island Weather Almanac  
Friday, September 22, 2023  
Partly Cloudy, Seasonal Temperatures  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    September 22, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   71   73   70   +1   88   in 1980   54   in 1904  
Minimum Temperature   54   56   56   -2   70   in 1989   36   in 1904  
Average Temperature   63   65   63   +0   78   in 1980   45   in 1904  
 Month Avg Max Temperature   78.2   74.7   73.3   +4.9   80.7   in 1983   68.5   in 1963  
Month Avg Min Temperature   62.9   59.6   58.5   +4.4   63.4   in 1961   52.7   in 1984  
Month Average Temperature   70.8   67.4   65.9   +4.9   71.6   in 1961   61.5   in 1963  
High Heat Index   71   75   71   +0   90   in 1895            
Low Wind Chill                             31   in 1904  
Heating Degree Days   2   0   3   -1   20   in 1904   0   in 2022  
Month Heating DD   8   14   38   -30   106   in 1956   2   in 2021  
Season Heating DD   8   14   38   -30   137   in 1956   2   in 2021  
Cooling Degree Days   0   0   2   -2   13   in 1980   0   in 2023  
Month Cooling DD   136   66   58   +78   160   in 1961   7   in 1893  
Year Cooling DD   708   777   595   +113   840   in 2020   282   in 1902  
Maximum Dew Point   61   70   61   +0   71   in 2011   41   in 2020  
Minimum Dew Point   50   52   51   -1   68   in 1989   32   in 2020  
Average  Dew Point   56   61   56   +0   70   in 1989   37   in 2020  
 Month Avg Max Dew Point   68.9   65.2   63.6   +5.3   68.9   in 2023   54.8   in 1984  
Month Avg Min Dew Point   60.5   55.8   54.0   +6.5   60.5   in 2023   44.0   in 1984  
Month Average Dew Point   64.9   60.8   58.8   +6.1   64.9   in 2023   49.4   in 1984  
Precipitation   .00   .74   .13   -.13   1.86   in 1979            
One Hour Rain   .00   .35           .58   in 1990            
Half Hour Rain   .00   .19           .36   in 2013            
Hourly Rain Rate   .00   1.86           3.13   in 2011            
Month Precipitation   3.85   4.01   2.71   +1.14   9.58   in 1960   .13   in 1946  
Year Precipitation   39.47   29.43   31.99   +7.48   48.02   in 1998   17.53   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 22, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   98%   99%   95%   +3%   100%   in 2017   78%   in 1955  
Minimum Humidity   56%   87%   62%   -6%   91%   in 2011   30%   in 2020  
Average Humidity   77%   93%   78%   -1%   95%   in 2011   56%   in 1955  
Maximum Barometer   30.41   29.82   30.11   +00.30   30.53   in 1929   29.73   in 1954  
Minimum Barometer   30.30   29.46   29.88   +00.42   30.30   in 2023   29.17   in 1966  
Average Barometer   30.36   29.64   30.00   +00.36   30.36   in 2023   29.51   in 1966  
Average Wind   5.3   9.6   6.7   -1.4   20.0   in 2017   2.0   in 2016  
Direction   ENE   SSW   SSW       NNE N
High Wind Gust   16   37   22   -6   43   in 2017   11   in 2016  
Direction   ENE   NNW   SW       NNE SE
Maximum Water Temp   69.4   71.2   68.0   +1.4   71.2   in 2021   64.6   in 2020  
Minimum Water Temp   68.7   70.3   66.1   +2.6   70.3   in 2021   63.1   in 2020  
Average Water Temp   69.1   70.8   67.0   +2.0   70.8   in 2021   63.9   in 2020  
Sunrise/ AM Twilight   6:32:15 AM   6:05:35 AM            
Sunset / PM Twilight   6:42:37 PM   7:10:02 PM            
Length Of Day   12:10:22                          
Special Conditions   None                                  
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