Portsmouth Rhode Island Weather Almanac  
Monday, August 21, 2023  
Partly Cloudy, Afternoon Haze, Light Winds, Warmer and Humid  
  Climate Normal Period Climate Record Period
  1991 - 2020 1893 - 2023
    August 21, 2023   Record   Record  
Observed Daily Data   2023   2022   Norm   Depart   Highest   Lowest  
Maximum Temperature   85   83   78   +7   92   in 1955   64   in 1956  
Minimum Temperature   67   66   63   +4   74   in 2009   50   in 1913  
Average Temperature   76   75   71   +5   82   in 1955   60   in 1956  
 Month Avg Max Temperature   78.9   83.3   79.0   -0.1   84.6   in 1937   72.6   in 1964  
Month Avg Min Temperature   64.3   66.9   64.3   +0.0   69.5   in 2018   55.9   in 1964  
Month Average Temperature   71.9   75.4   71.7   +0.2   76.9   in 1937   64.6   in 1964  
High Heat Index   93   88   79   +14   100   in 1955            
Low Wind Chill                             49   in 1913  
Heating Degree Days   0   0   0   +0   5   in 1956   0   in 2023  
Month Heating DD   0   0   0   +0   26   in 1964   0   in 2023  
Season Heating DD   0   0   0   +0   26   in 1964   0   in 2023  
Cooling Degree Days   11   10   5   +6   17   in 1955   0   in 2007  
Month Cooling DD   144   218   151   -7   250   in 1937   17   in 1964  
Year Cooling DD   528   606   479   +49   681   in 2020   210   in 1902  
Maximum Dew Point   75   72   68   +7   77   in 2009   46   in 1969  
Minimum Dew Point   64   62   59   +5   73   in 2009   38   in 1982  
Average  Dew Point   70   67   63   +7   75   in 2009   43   in 1969  
 Month Avg Max Dew Point   69.2   70.8   68.6   +0.7   73.1   in 2018   57.9   in 1964  
Month Avg Min Dew Point   59.9   63.0   60.4   -0.5   66.9   in 2018   47.4   in 1964  
Month Average Dew Point   64.5   66.9   64.4   +0.1   70.0   in 2018   52.6   in 1964  
Precipitation   .00   .00   .12   -.12   1.97   in 1997            
One Hour Rain   .00   .00           .88   in 1994            
Half Hour Rain   .00   .00           .27   in 2004            
Hourly Rain Rate   .00   .00           2.17   in 2004            
Month Precipitation   4.15   .62   2.51   +1.64   9.62   in 1946   .16   in 1993  
Year Precipitation   34.40   24.03   28.16   +6.24   43.94   in 1983   15.70   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 21, 2023     Record Record
Observed Daily Data   2023   2022   Norm   Depart   Highest Lowest
Maximum Humidity   98%   99%   92%   +6%   100%   in 2004   58%   in 1983  
Minimum Humidity   68%   57%   59%   +9%   95%   in 1961   29%   in 1987  
Average Humidity   83%   78%   76%   +7%   98%   in 1961   48%   in 1983  
Maximum Barometer   30.05   30.18   30.08   -00.03   30.40   in 1926   29.82   in 1955  
Minimum Barometer   29.96   30.06   29.88   +00.08   30.21   in 2000   29.54   in 1988  
Average Barometer   30.01   30.12   29.98   +00.02   30.27   in 1974   29.72   in 1971  
Average Wind   3.4   2.6   5.6   -2.2   14.0   in 1980   1.6   in 1965  
Direction   WNW   SSE   SSW       NE SE
High Wind Gust   13   14   20   -7   46   in 1997   10   in 1998  
Direction   WNW   SW   S       ESE W
Maximum Water Temp   72.0   75.0   71.5   +0.5   78.1   in 2003   66.4   in 2020  
Minimum Water Temp   69.3   73.2   68.7   +0.6   73.2   in 2022   64.1   in 2008  
Average Water Temp   70.7   74.1   70.1   +0.5   74.1   in 2022   65.3   in 2020  
Sunrise/ AM Twilight   5:59:43 AM   4:58:34 AM            
Sunset / PM Twilight   7:36:00 PM   8:44:54 PM            
Length Of Day   13:36:17                          
Special Conditions   Haze                                
Comments      
Hour-by-Hour Weather For August 21, 2023            
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