Portsmouth Rhode Island Weather Almanac  
Sunday, July 21, 2024  
Cloudy, Very Light Rain early, Partly Cloudy Day to Clear PM, Light Winds, Warmer  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2024
    July 21, 2024   Record   Record  
Observed Daily Data   2024   2023   Norm   Depart   Highest   Lowest  
Maximum Temperature   85   77   80   +5   96   in 1991   68   in 1936  
Minimum Temperature   69   66   65   +4   76   in 2019   53   in 2000  
Average Temperature   77   72   73   +4   85   in 2019   64   in 2000  
 Month Avg Max Temperature   82.2   81.5   79.6   +2.6   84.8   in 1955   74.3   in 1902  
Month Avg Min Temperature   68.7   68.2   64.4   +4.3   71.1   in 2013   58.2   in 1962  
Month Average Temperature   75.7   75.1   72.4   +3.3   77.4   in 2013   67.7   in 2009  
High Heat Index   90   81   83   +7   109   in 2019                      
Low Wind Chill                                      
Heating Degree Days   0   0   0   +0   1   in 2000   0   in 2024  
Month Heating DD   0   0   3   -3   23   in 1914   0   in 2024  
Season Heating DD   0   0   3   -3   23   in 1914   0   in 2024    
Cooling Degree Days   12   7   8   +4   20   in 2019   0   in 2018    
Month Cooling DD   224   213   155   +69   260   in 2013   66   in 2009    
Year Cooling DD   362   289   248   +114   374   in 2010   93   in 1902    
Maximum Dew Point   71   73   69   +2   79   in 2019   51   in 1965    
Minimum Dew Point   66   65   61   +5   71   in 2022   43   in 1966    
Average  Dew Point   69   69   65   +4   75   in 2022   48   in 1966  
 Month Avg Max Dew Point   73.6   74.8   68.4   +5.2   74.8   in 2023   61.1   in 1978  
Month Avg Min Dew Point   66.1   66.9   59.9   +6.2   68.7   in 2013   51.4   in 1962  
Month Average Dew Point   69.9   70.8   64.1   +5.7   71.4   in 2013   56.4   in 1962  
Precipitation   .01   .00   .09   -.08   1.65   in 1973            
One Hour Rain   .01   .00           .52   in 1988            
Half Hour Rain   .01   .00           .13   in 2009            
Hourly Rain Rate   .00   .00           1.88   in 2009            
Month Precipitation   .92   5.46   2.09   -1.17   6.32   in 2009   .16   in 2002  
Year Precipitation   34.87   29.94   24.79   +10.08   40.76   in 1998   13.52   in 1957  
Snow   0.0   0.0   0.0   +0.0   0.0   in 1900            
Snow Depth   0   0   0   +0   0   in              
Month Snow   #N/A   #N/A   #N/A   #N/A   #N/A   in #N/A   #N/A   in Many  
Season Snow                                      
    July 21, 2024     Record Record
Observed Daily Data   2024   2023   Norm   Depart   Highest Lowest
Maximum Humidity   94%   99%   92%   +2%   100%   in 2004   72%   in 1966  
Minimum Humidity   54%   86%   60%   -6%   93%   in 1988   34%   in 1991  
Average Humidity   74%   93%   76%   -2%   97%   in 1988   54%   in 1966  
Maximum Barometer   30.05   29.90   30.01   +00.04   30.40   in 1929   29.65   in 2015  
Minimum Barometer   29.98   29.73   29.83   +00.15   30.12   in 1999   29.40   in 1981  
Average Barometer   30.02   29.82   29.92   +00.10   30.16   in 1999   29.55   in 1981  
Average Wind   4.6   5.5   5.4   -0.8   11.3   in 2003   1.8   in 2005  
Direction   W   SE   SW       S         SSE        
High Wind Gust   19   16   20   -1   44   in 1916   10   in 1973  
Direction   S   S   SSW       SSE         NNE        
Maximum Water Temp   73.9   76.6   71.7   +2.2   76.6   in 2023   67.9   in 2009  
Minimum Water Temp   70.9   70.9   68.2   +2.7   73.2   in 2010   64.0   in 2020  
Average Water Temp   72.4   73.8   69.9   +2.5   74.4   in 2010   66.2   in 2020  
Sunrise/ AM Twilight   5:29:46 AM   4:58:34 AM            
Sunset / PM Twilight   8:12:46 PM   8:44:54 PM            
Length Of Day   14:44:18                          
Special Conditions   None                                  
Comments                                      
Hour-by-Hour Weather For July 21, 2024
Climate Weather for July 21
Weather History For July 21
Weather Calendar
Back To Weather Stat Page