Portsmouth Rhode Island Weather Almanac  
Monday, July 31, 2023  
Clear to Partly Cloudy PM, Light Winds, Continued Cool  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    July 31, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   81   81   80   +1   97   in 1917   63   in 1923  
Minimum Temperature   59   63   65   -6   73   in 1917   51   in 1956  
Average Temperature   70   72   73   -3   85   in 1917   61   in 1923  
 Month Avg Max Temperature   81.9   82.1   79.7   +2.1   84.7   in 1952   74.3   in 1902  
Month Avg Min Temperature   67.5   66.4   64.6   +2.9   69.6   in 2013   59.5   in 1962  
Month Average Temperature   74.9   74.5   72.6   +2.4   75.9   in 2013   67.6   in 1914  
High Heat Index   81   81           111   in 1917            
Low Wind Chill                                      
Heating Degree Days   0   0   0   +0   4   in 1923   0   in 2023  
Month Heating DD   0   0   3   -3   32   in 1914   0   in 2022  
Season Heating DD   0   0   3   -3   32   in 1914   0   in 2022  
Cooling Degree Days   5   7   7   -2   20   in 1917   0   in 2021  
Month Cooling DD   308   293   235   +73   339   in 2013   108   in 1902  
Year Cooling DD   384   388   328   +56   472   in 2010   133   in 1902  
Maximum Dew Point   64   65   69   -5   76   in 1994   50   in 1964  
Minimum Dew Point   57   59   61   -4   70   in 2004   42   in 1964  
Average  Dew Point   61   62   65   -4   73   in 2004   46   in 1964  
 Month Avg Max Dew Point   74.1   70.5   68.6   +5.5   74.1   in 2023   61.8   in 1965  
Month Avg Min Dew Point   65.8   61.6   60.3   +5.6   66.7   in 2013   51.8   in 1965  
Month Average Dew Point   70.0   66.1   64.4   +5.5   70.0   in 2023   56.8   in 1965  
Precipitation   .00   .00   .10   -.10   1.38   in 1927            
One Hour Rain   .00   .00           .25   in 1996            
Hourly Rain Rate   .00   .00           2.77   in 2009            
Month Precipitation   5.77   .51   3.08   +2.69   9.05   in 2009   .36   in 1952  
Year Precipitation   30.25   23.41   25.65   +4.60   41.55   in 1998   14.33   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  
    July 31, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   96%   91%   94%   +2%   100%   in 2015   63%   in 1964  
Minimum Humidity   45%   52%   60%   -15%   89%   in 2009   34%   in 1953  
Average Humidity   71%   72%   77%   -6%   93%   in 2009   50%   in 1964  
Maximum Barometer   30.04   30.17   30.06   -00.02   30.37   in 1968   29.73   in 2008  
Minimum Barometer   29.90   30.08   29.88   +00.02   30.22   in 2003   29.56   in 2008  
Average Barometer   29.97   30.13   29.97   +00.00   30.25   in 2003   29.65   in 2008  
Average Wind   4.5   5.2   5.1   -0.6   10.9   in 1971   1.6   in 1965  
Direction   NW   SSW   SSW       SSW S
High Wind Gust   24   20   19   +5   36   in 1954   9   in 1998  
Direction   SW   S   SSE       SSW N
Maximum Water Temp   73.8   73.8   71.8   +2.0   75.4   in 2006   66.7   in 1996  
Minimum Water Temp   70.7   71.4   68.6   +2.1   71.8   in 2021   63.5   in 2020  
Average Water Temp   72.3   72.6   70.2   +2.1   73.0   in 2013   65.9   in 1996  
Sunrise/ AM Twilight   5:38:28 AM   5:09:04 AM            
Sunset / PM Twilight   8:03:51 PM   8:34:07 PM            
Length Of Day   14:25:23                          
Special Conditions   None                              
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