Portsmouth Rhode Island Weather Almanac  
Monday, August 28, 2023  
Cloudy/Dense Fog early, Mostly Cloudy Day to P Cloudy PM, Light Winds, Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    August 28, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   75   82   78   -3   95   in 1948   63   in 1987  
Minimum Temperature   62   65   62   +0   74   in 1948   49   in 1905  
Average Temperature   69   74   70   -1   85   in 1948   60   in 1908  
 Month Avg Max Temperature   78.2   83.3   78.8   -0.5   83.3   in 2022   73.3   in 1964  
Month Avg Min Temperature   63.7   67.0   63.9   -0.2   67.9   in 2018   56.7   in 1964  
Month Average Temperature   71.2   75.4   71.3   -0.1   75.4   in 2022   65.3   in 1964  
High Heat Index   76   86   80   -4   107   in 1948            
Low Wind Chill                             47   in 1905  
Heating Degree Days   0   0   1   -1   5   in 1908   0   in 2023  
Month Heating DD   0   0   1   -1   36   in 1905   0   in 2023  
Season Heating DD   0   0   1   -1   36   in 1905   0   in 2023  
Cooling Degree Days   4   9   5   -1   20   in 1948   0   in 1996  
Month Cooling DD   174   292   193   -19   292   in 2022   36   in 1964  
Year Cooling DD   558   680   521   +37   753   in 2020   239   in 1902  
Maximum Dew Point   68   71   66   +2   78   in 2018   48   in 1968  
Minimum Dew Point   61   59   58   +3   69   in 2018   38   in 1982  
Average  Dew Point   65   65   62   +3   74   in 2018   45   in 1968  
 Month Avg Max Dew Point   68.9   71.4   68.1   +0.8   72.6   in 2021   59.6   in 1964  
Month Avg Min Dew Point   59.7   63.5   59.9   -0.2   65.0   in 2018   49.4   in 1964  
Month Average Dew Point   64.3   67.4   64.0   +0.3   68.6   in 2018   54.5   in 1964  
Precipitation   .00   .00   .11   -.11   1.88   in 2006            
One Hour Rain   .00   .00           1.21   in 2006            
Half Hour Rain   .00   .00           .61   in 2006            
Hourly Rain Rate   .00   .00           5.14   in 2011            
Month Precipitation   5.09   1.10   3.30   +1.79   11.69   in 1946   .33   in 1993  
Year Precipitation   35.34   24.51   28.95   +6.39   44.83   in 1998   16.49   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  
    August 28, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   96%   93%   +6%   100%   in 2013   71%   in 1968  
Minimum Humidity   78%   56%   59%   +19%   94%   in 1987   33%   in 1995  
Average Humidity   89%   76%   76%   +13%   97%   in 1987   55%   in 1968  
Maximum Barometer   30.09   30.21   30.07   +00.02   30.35   in 2002   29.73   in 2011  
Minimum Barometer   30.01   30.13   29.88   +00.13   30.23   in 2017   29.12   in 2011  
Average Barometer   30.05   30.17   29.98   +00.07   30.29   in 2002   29.43   in 2011  
Average Wind   3.0   4.5   6.1   -3.1   20.6   in 2011   1.7   in 1989  
Direction   SSE   SSE   S       S SSE
High Wind Gust   12   17   21   -9   55   in 2011   12   in 2023  
Direction   SSE   S   SW       SW SSE
Maximum Water Temp   69.8   73.4   71.1   -1.3   76.6   in 2021   65.7   in 2020  
Minimum Water Temp   68.7   71.2   68.4   +0.3   72.9   in 2021   62.5   in 2003  
Average Water Temp   69.3   72.3   69.7   -0.5   74.8   in 2021   64.2   in 2020  
Sunrise/ AM Twilight   6:06:51 AM   5:05:50 AM            
Sunset / PM Twilight   7:25:02 PM   8:37:39 PM            
Length Of Day   13:18:11                          
Special Conditions   Dense Fog  
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Hour-by-Hour Weather For August 28, 2023            
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