Portsmouth Rhode Island Weather Almanac
Tuesday, September 17, 2019
Clear to Partly Cloudy PM, Breezy with Sesonal Temperatures
Climate Normal Period Climate Record Period  
1981- 2010   1893 - 2019  
    September 17, 2019     Record Record
Observed Daily Data   Observed   2018   Normal   Depart   Highest Lowest
Maximum Temperature   72   77   71   +1   86   in 1991   57   in 1954  
Minimum Temperature   55   64   56   -1   69   in 1991   43   in 1948  
Average Temperature   64   71   64   +0   78   in 1991   53   in 2013  
Precipitation   .00   .00   .13   -.13   2.66   in 1933            
One Hour   .00   .00           .76   in 1995            
Snow   0.0   0.0   0.0   +0.0   0.0   in              
Snow Depth   0   0               in            
HDD   1   0   2   -1   12   in 2013   0   in 2018  
CDD   0   6   1   -1   13   in 1991   0   in 2019  
Maximum Dew Point   54   70   60   -6   72   in 1991   43   in 2013  
Minimum Dew Point   48   63   51   -3   68   in 1991   28   in 1959  
Average  Dew Point   51   67   55   -4   70   in 1991   38   in 1959  
Maximum Humidity   89%   97%   93%   -4%   100%   in 2017   67%   in 2000  
Minimum Humidity   45%   69%   61%   -16%   98%   in 1993   28%   in 1968  
Average Humidity   67%   83%   77%   -10%   99%   in 1993   54%   in 1950  
Maximum Barometer   30.18   30.22   30.16   +00.02   30.55   in 1986   29.83   in 1952  
Minimum Barometer   30.06   29.97   29.94   +00.12   30.37   in 2011   29.18   in 1999  
Average Barometer   30.12   30.10   30.05   +00.07   30.43   in 2011   29.52   in 1999  
Average Wind   7.2   3.8   5.4   +1.8   18.9   in 1999   0.9   in 2006  
Direction   N   SSW   N       WNW         SSE        
High Wind Gust   23   13   20   +3   50   in 1999   10   in 2006  
Direction   NNW   SSW   N       SW         S        
High Heat Index   70   80   71   -1   96   in 1991            
Wind Chill                                      
Maximum Water Temp   68.0   70.9   68.1   -0.1   71.1   in 2015   64.8   in 2013  
Minimum Water Temp   67.3   69.4   66.1   +1.2   69.4   in 2018   61.8   in 2013  
Average Water Temp   67.7   70.2   67.1   +0.5   70.2   in 2018   63.3   in 2013  
Sunrise/ AM Twilight   6:28:26 AM   6:00:48 AM            
Sunset / PM Twilight   6:50:26 PM   7:18:05 PM            
Length Of Day   12:22:00                          
Special Conditions   None                                  
Comments      
    September 17, 2019     Record Record
Month-to-Date Summary   Observed   2018   Normal Depart Highest Lowest
 Avg Maximum Temperature   74.7   76.0   73.7   +1.0   81.2   in 1983   68.1   in 1917  
Avg Minimum Temperature   57.7   63.7   58.5   -0.8   64.8   in 1961   52.7   in 1893  
Average Temperature   66.2   69.9   66.1   +0.1   72.9   in 1961   61.2   in 1963  
Total Precipitation   .64   2.60   2.21   -1.57   7.91   in 1932   .03   in 1980  
Total Snow   0.0   0.0   0.0   +0.0   0.0   in     0.0   in    
Total HDD   17   9   25   -8   85   in 1913   0   in 2015  
Total CDD   41   96   47   -6   148   in 1961   7   in 1975  
Avg Maximum Dew Point   64.0   59.9   61.8   +2.2   68.9   in 1999   55.1   in 1975  
Avg Minimum Dew Point   53.7   49.0   52.7   +1.0   60.6   in 1971   44.6   in 1967  
Average  Dew Point   58.9   54.6   57.3   +1.6   64.6   in 1999   50.1   in 1967  
    September 17, 2019     Record Record
Year-to-Date Summary   Observed   2018   Normal Depart Highest Lowest
Total Precipitation   38.47   31.44   33.70   +4.77   46.35   in 1998   17.53   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)   20   9   34   -14   97   in 1913   0   in 2015  
Total CDD (since Jan 1)   699   744   545   +154   758   in 2016   280   in 1902  
                             
Hour-by-Hour Weather For September 17, 2019  
Climate Weather for September 17  
Weather History For September 17  
Weather Calendar  
Back To Weather Stat Page  
Home