Portsmouth Rhode Island Weather Almanac  
Saturday, July 29, 2023  
Mostly Cloudy early, Partly Cloudy Late Rain/Thunderstorm, Breezy and Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    July 29, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   84   86   80   +4   92   in 1949   67   in 1926  
Minimum Temperature   66   72   65   +1   73   in 1995   55   in 1977  
Average Temperature   75   79   73   +2   82   in 1949   62   in 1914  
 Month Avg Max Temperature   82.1   82.0   79.7   +2.4   84.8   in 1952   74.0   in 1902  
Month Avg Min Temperature   68.0   66.3   64.6   +3.4   70.0   in 2013   59.3   in 1962  
Month Average Temperature   75.3   74.4   72.6   +2.8   76.2   in 2013   67.8   in 1902  
High Heat Index   94   91           100   in 1949            
Low Wind Chill                                      
Heating Degree Days   0   0   0   +0   3   in 1914   0   in 2023  
Month Heating DD   0   0   3   -3   28   in 1914   0   in 2023  
Season Heating DD   0   0   3   -3   28   in 1914   0   in 2023  
Cooling Degree Days   10   14   8   +2   17   in 1949   0   in 2017  
Month Cooling DD   299   273   219   +80   326   in 2013   95   in 1902  
Year Cooling DD   375   368   312   +63   463   in 2010   120   in 1902  
Maximum Dew Point   78   73   70   +8   78   in 2023   50   in 1968  
Minimum Dew Point   65   66   61   +4   70   in 2007   44   in 1968  
Average  Dew Point   72   70   65   +7   73   in 1995   47   in 1968  
 Month Avg Max Dew Point   74.8   70.8   68.6   +6.1   74.8   in 2023   61.9   in 1962  
Month Avg Min Dew Point   66.5   61.8   60.2   +6.3   67.4   in 2013   52.0   in 1965  
Month Average Dew Point   70.6   66.3   64.4   +6.2   70.6   in 2023   57.1   in 1965  
Precipitation   .24   .00   .10   +.14   2.10   in 1897            
One Hour Rain   .20   .00           .90   in 2002            
Hourly Rain Rate   .90   .00           .90   in 2023            
Month Precipitation   5.77   .49   2.88   +2.89   8.73   in 2009   .36   in 1952  
Year Precipitation   30.25   23.39   25.45   +4.80   41.06   in 1998   14.31   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 29, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   99%   93%   +6%   100%   in 2016   70%   in 1956  
Minimum Humidity   77%   59%   62%   +15%   93%   in 1986   33%   in 1968  
Average Humidity   88%   79%   78%   +10%   97%   in 1986   52%   in 1968  
Maximum Barometer   29.92   29.91   30.01   -00.09   30.33   in 1984   29.77   in 1966  
Minimum Barometer   29.62   29.78   29.82   -00.20   30.24   in 1996   29.48   in 1981  
Average Barometer   29.77   29.85   29.91   -00.14   30.28   in 1996   29.65   in 1966  
Average Wind   7.8   4.9   5.5   +2.3   11.4   in 1968   1.6   in 1996  
Direction   SSW   SSW   SSW       WNW SSE
High Wind Gust   35   24   20   +15   44   in 1941   10   in 1991  
Direction   SSW   SSW   SSW       NE NNE
Maximum Water Temp   77.4   73.6   71.9   +5.5   77.4   in 2023   68.5   in 2017  
Minimum Water Temp   73.9   71.8   68.4   +6.7   73.9   in 2023   60.6   in 2003  
Average Water Temp   75.7   72.7   70.2   +6.1   75.7   in 2023   66.3   in 2017  
Sunrise/ AM Twilight   5:36:31 AM   5:06:54 AM            
Sunset / PM Twilight   8:05:59 PM   8:36:30 PM            
Length Of Day   14:29:28                          
Special Conditions   Dense Fog, Thunderstorm                      
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