Portsmouth Rhode Island Weather Almanac  
Thursday, August 17, 2023  
Mostly Cloudy early then Cloudy, Light Rain & Fog Late, Light Winds, Continued Cool  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    August 17, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   74   78   78   -4   91   in 2002   65   in 1909  
Minimum Temperature   64   61   64   +0   74   in 1955   52   in 1981  
Average Temperature   69   70   71   -2   81   in 2002   61   in 1909  
 Month Avg Max Temperature   78.6   83.0   79.2   -0.6   84.4   in 1988   72.1   in 1964  
Month Avg Min Temperature   64.4   67.2   64.5   -0.1   71.6   in 1988   55.7   in 1964  
Month Average Temperature   71.8   75.4   71.8   -0.1   78.4   in 1988   64.2   in 1964  
High Heat Index   76   78   81   -5   98   in 2002            
Low Wind Chill                             49   in 1957  
Heating Degree Days   0   0   0   +0   4   in 1909   0   in 2023  
Month Heating DD   0   0   0   +0   24   in 1964   0   in 2023  
Season Heating DD   0   0   0   +0   24   in 1964   0   in 2023  
Cooling Degree Days   4   5   6   -2   16   in 2002   0   in 2000  
Month Cooling DD   115   177   126   -11   227   in 1988   11   in 1964  
Year Cooling DD   499   565   454   +45   654   in 2020   208   in 1902  
Maximum Dew Point   69   65   68   +1   76   in 2010   51   in 1981  
Minimum Dew Point   63   54   59   +4   72   in 1955   43   in 1961  
Average  Dew Point   66   60   64   +2   74   in 1955   49   in 1981  
 Month Avg Max Dew Point   69.0   70.9   68.7   +0.3   74.1   in 2018   57.5   in 1964  
Month Avg Min Dew Point   60.3   63.3   60.7   -0.4   67.9   in 2018   46.9   in 1964  
Month Average Dew Point   64.6   67.1   64.6   +0.0   71.0   in 2018   52.2   in 1964  
Precipitation   .01   .15   .12   -.11   1.65   in 1909            
One Hour Rain   .01   .04           .90   in 1997            
Half Hour Rain   .00   .02           .11   in 2010            
Hourly Rain Rate   .00   .07           2.35   in 2010            
Month Precipitation   3.57   .62   2.03   +1.54   7.57   in 1946   .07   in 1940  
Year Precipitation   33.82   24.03   27.68   +6.14   43.87   in 1983   15.70   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  
    August 17, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   96%   93%   +6%   100%   in 2003   77%   in 1980  
Minimum Humidity   81%   51%   59%   +22%   95%   in 1998   30%   in 2007  
Average Humidity   90%   74%   76%   +14%   98%   in 1998   55%   in 1980  
Maximum Barometer   30.02   30.01   30.04   -00.02   30.37   in 1947   29.71   in 1952  
Minimum Barometer   29.86   29.86   29.86   +00.00   30.20   in 1994   29.44   in 1977  
Average Barometer   29.94   29.94   29.95   -00.01   30.25   in 1994   29.65   in 1958  
Average Wind   3.8   6.3   5.8   -2.0   12.8   in 1969   1.7   in 1964  
Direction   E   N   SSW       WSW SSE
High Wind Gust   11   20   20   -9   35   in 1981   10   in 2004  
Direction   ENE   N   SSW       NNW SSE
Maximum Water Temp   70.2   72.0   72.0   -1.8   75.5   in 2016   66.8   in 2020  
Minimum Water Temp   69.4   70.7   69.0   +0.4   73.6   in 2018   64.9   in 2020  
Average Water Temp   69.8   71.4   70.5   -0.7   74.4   in 2018   65.9   in 2020  
Sunrise/ AM Twilight   5:55:37 AM   4:54:40 AM            
Sunset / PM Twilight   7:41:58 PM   8:48:22 PM            
Length Of Day   13:46:21                          
Special Conditions   Fog                                  
Comments      
Hour-by-Hour Weather For August 17, 2023            
Climate Weather for August 17            
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