Portsmouth Rhode Island Weather Almanac
Saturday, August 17, 2019
Cloudy, Dense Fog early and Late, Seasonal Temperatures
Climate Normal Period Climate Record Period  
1981- 2010   1893 - 2019  
    August 17, 2019     Record Record
Observed Daily Data   Observed   2018   Normal   Depart   Highest Lowest
Maximum Temperature   77   85   78   -1   91   in 2002   65   in 1909  
Minimum Temperature   66   71   63   +3   74   in 1955   52   in 1981  
Average Temperature   72   78   71   +1   81   in 2002   61   in 1909  
Precipitation   .00   .00   .12   -.12   1.65   in 1909            
One Hour   .00   .00           .90   in 1997            
Snow   0.0   0.0   0.0   +0.0   0.0   in              
Snow Depth   0   0               in            
HDD   0   0   0   +0   4   in 1909   0   in 2019  
CDD   7   13   6   +1   16   in 2002   0   in 2000  
Maximum Dew Point   72   75   67   +6   76   in 2010   51   in 1981  
Minimum Dew Point   65   69   58   +7   72   in 1955   43   in 1961  
Average  Dew Point   69   72   62   +7   74   in 1955   49   in 1981  
Maximum Humidity   98%   94%   93%   +5%   100%   in 2003   77%   in 1980  
Minimum Humidity   82%   70%   60%   +22%   95%   in 1998   30%   in 2007  
Average Humidity   90%   82%   76%   +14%   98%   in 1998   55%   in 1980  
Maximum Barometer   30.09   30.09   30.04   +00.05   30.37   in 1947   29.71   in 1952  
Minimum Barometer   29.99   29.94   29.85   +00.14   30.20   in 1994   29.44   in 1977  
Average Barometer   30.04   30.02   29.94   +00.10   30.25   in 1994   29.65   in 1958  
Average Wind   6.0   5.1   5.9   +0.1   12.8   in 1969   1.7   in 1964  
Direction   SE   SSW   SSW       WSW         SSE        
High Wind Gust   17   19   20   -3   35   in 1981   10   in 2004  
Direction   SE   SSW   SSW       NNW         SSE        
High Heat Index   80   94   81   -1   98   in 2002            
Wind Chill                                      
Maximum Water Temp   73.1   75.2   72.1   +1.0   75.5   in 2016   68.3   in 2004  
Minimum Water Temp   71.2   73.6   68.9   +2.3   73.6   in 2018   65.5   in 2008  
Average Water Temp   72.2   74.4   70.5   +1.6   74.4   in 2018   67.0   in 2004  
Sunrise/ AM Twilight   5:57:02 AM   5:27:35 AM            
Sunset / PM Twilight   7:41:15 PM   8:10:42 PM            
Length Of Day   13:44:13                          
Special Conditions   Dense Fog                              
Comments      
    August 17, 2019     Record Record
Month-to-Date Summary   Observed   2018   Normal Depart Highest Lowest
 Avg Maximum Temperature   81.5   83.3   78.9   +2.5   85.5   in 1944   72.1   in 1964  
Avg Minimum Temperature   64.9   70.5   64.6   +0.3   71.6   in 1988   55.7   in 1964  
Average Temperature   73.2   76.9   71.8   +1.4   78.0   in 1988   63.9   in 1964  
Total Precipitation   .66   2.64   2.01   -1.35   7.57   in 1946   .07   in 1940  
Total Snow   0.0   0.0   0.0   +0.0   0.0   in     0.0   in    
Total HDD   0   0   0   +0   24   in 1964   0   in 2019  
Total CDD   144   206   124   +20   227   in 1988   11   in 1964  
Avg Maximum Dew Point   68.3   74.1   68.0   +0.3   74.1   in 2018   57.5   in 1964  
Avg Minimum Dew Point   59.6   67.9   59.9   -0.2   67.9   in 2018   46.9   in 1964  
Average  Dew Point   64.0   71.0   64.0   +0.0   71.0   in 2018   52.2   in 1964  
    August 17, 2019     Record Record
Year-to-Date Summary   Observed   2018   Normal Depart Highest Lowest
Total Precipitation   35.89   27.77   29.69   +6.20   43.87   in 1983   15.70   in 1957  
Total Snow (since Jul 1 19)   0.0   0.0   0.0   +0.0   0.0   in     0.0   in    
Total HDD (since Jul 1 19)   0   0   0   +0   24   in 1964   0   in 2019  
Total CDD (since Jan 1)   564   534   428   +136   608   in 2010   208   in 1902  
                             
Hour-by-Hour Weather For August 17, 2019  
Climate Weather for August 17  
Weather History For August 17  
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