Portsmouth Rhode Island Weather Almanac  
Friday, July 21, 2023  
Partly Cloudy to Cloudy PM, Fog, Much Cooler  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    July 21, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   77   82   80   -3   96   in 1991   68   in 1936  
Minimum Temperature   66   72   65   +1   76   in 2019   53   in 2000  
Average Temperature   72   77   73   -1   85   in 2019   64   in 2000  
 Month Avg Max Temperature   81.5   81.1   79.6   +1.9   84.8   in 1955   74.3   in 1902  
Month Avg Min Temperature   68.2   65.2   64.4   +3.8   71.1   in 2013   58.2   in 1962  
Month Average Temperature   75.1   73.5   72.4   +2.8   77.4   in 2013   67.7   in 2009  
High Heat Index   81   90           109   in 2019            
Low Wind Chill                                      
Heating Degree Days   0   0   0   +0   1   in 2000   0   in 2023  
Month Heating DD   0   0   3   -3   23   in 1914   0   in 2023  
Season Heating DD   0   0   3   -3   23   in 1914   0   in 2023  
Cooling Degree Days   7   12   8   -1   20   in 2019   0   in 2018  
Month Cooling DD   213   178   155   +58   260   in 2013   66   in 2009  
Year Cooling DD   289   273   248   +41   374   in 2010   93   in 1902  
Maximum Dew Point   73   78   69   +4   79   in 2019   51   in 1965  
Minimum Dew Point   65   71   61   +4   71   in 2022   43   in 1966  
Average  Dew Point   69   75   65   +4   75   in 2022   48   in 1966  
 Month Avg Max Dew Point   74.8   69.7   68.4   +6.4   74.8   in 2023   61.1   in 1978  
Month Avg Min Dew Point   66.9   60.7   59.9   +7.0   68.7   in 2013   51.4   in 1962  
Month Average Dew Point   70.8   65.2   64.1   +6.7   71.4   in 2013   56.4   in 1962  
Precipitation   .00   .00   .09   -.09   1.65   in 1973            
One Hour Rain   .00   .00           .52   in 1988            
Hourly Rain Rate   .00   .00           1.88   in 2009            
Month Precipitation   5.46   .49   2.09   +3.37   6.32   in 2009   .16   in 2002  
Year Precipitation   29.94   23.39   24.66   +5.28   40.76   in 1998   13.52   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 21, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   99%   99%   92%   +7%   100%   in 2004   72%   in 1966  
Minimum Humidity   86%   87%   60%   +26%   93%   in 1988   34%   in 1991  
Average Humidity   93%   93%   76%   +17%   97%   in 1988   54%   in 1966  
Maximum Barometer   29.90   29.73   30.01   -00.11   30.40   in 1929   29.65   in 2015  
Minimum Barometer   29.73   29.65   29.83   -00.10   30.12   in 1999   29.40   in 1981  
Average Barometer   29.82   29.69   29.92   -00.10   30.16   in 1999   29.55   in 1981  
Average Wind   5.5   8.0   5.4   +0.1   11.3   in 2003   1.8   in 2005  
Direction   SE   SW   SW       S SSE
High Wind Gust   16   27   20   -4   44   in 1916   10   in 1973  
Direction   S   SSW   SSW       SSE NNE
Maximum Water Temp   76.6   74.3   71.6   +5.0   76.6   in 2023   67.9   in 2009  
Minimum Water Temp   70.9   73.2   68.1   +2.8   73.2   in 2010   64.0   in 2020  
Average Water Temp   73.8   73.8   69.9   +3.9   74.4   in 2010   66.2   in 2020  
Sunrise/ AM Twilight   5:29:05 AM   4:58:34 AM            
Sunset / PM Twilight   8:13:23 PM   8:44:54 PM            
Length Of Day   14:44:18                          
Special Conditions   Dense Fog                              
Comments      
Hour-by-Hour Weather For July 21, 2023            
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