Portsmouth Rhode Island Weather Almanac
Saturday, April 18, 2020
Cloudy, Moderate/Heavy Rain and Fog, Windy and Very Cold
Climate Normal Period Climate Record Period  
1981- 2010   1893 - 2020  
    April 18, 2020     Record Record
Observed Daily Data   Observed   2019   Normal   Depart   Highest Lowest
Maximum Temperature   40   54   56   -16   80   in 1976   39   in 1921  
Minimum Temperature   35   39   40   -5   53   in 2002   29   in 2003  
Average Temperature   38   47   48   -10   67   in 1976   36   in 1921  
Precipitation   .77   .05   .15   +.62   2.05   in 1967            
One Hour   .17   .02           .33   in 1967            
Snow   0.0   0.0   0.0   +0.0   T   in 2001            
Snow Depth   0   0           T   in 2005            
HDD   27   18   17   +10   29   in 1921   0   in 1976  
CDD   0   0   0   +0   2   in 1976            
Maximum Dew Point   37   52   43   -6   59   in 2002   23   in 1990  
Minimum Dew Point   33   36   30   +4   50   in 2002   11   in 1985  
Average  Dew Point   35   44   36   -1   55   in 2002   20   in 1990  
Maximum Humidity   95%   96%   86%   +9%   100%   in 2001   58%   in 2008  
Minimum Humidity   88%   73%   45%   +43%   97%   in 1987   14%   in 2005  
Average Humidity   92%   85%   65%   +26%   99%   in 1987   39%   in 1950  
Maximum Barometer   30.02   30.29   30.06   -00.04   30.60   in 2014   29.49   in 1997  
Minimum Barometer   29.68   29.96   29.81   -00.13   30.50   in 2003   28.99   in 1997  
Average Barometer   29.85   30.13   29.93   -00.08   30.54   in 2003   29.24   in 1997  
Average Wind   10.7   10.8   7.5   +3.2   20.2   in 1986   3.5   in 1978  
Direction   NNE   SE   WNW       NNE         SSE        
High Wind Gust   25   30   25   +0   47   in 1986   13   in 1953  
Direction   N   S   WNW       NNE         SE        
High Heat Index                                      
Wind Chill   27   37   34   -7             19   in 1971  
Maximum Water Temp   42.3   45.1   47.5   -5.2   55.4   in 2012   42.3   in 2020  
Minimum Water Temp   39.9   42.3   44.6   -4.7   49.8   in 2012   39.9   in 2020  
Average Water Temp   41.1   43.7   46.1   -5.0   52.6   in 2012   41.1   in 2020  
Sunrise/ AM Twilight   5:58:33 AM   5:29:32 AM            
Sunset / PM Twilight   7:30:03 PM   7:59:04 PM            
Length Of Day   13:29:32                          
Special Conditions   Fog                                  
Comments      
    April 18, 2020     Record Record
Month-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
 Avg Maximum Temperature   52.3   54.9   53.3   -1.0   61.9   in 1945   45.7   in 2007  
Avg Minimum Temperature   38.3   38.8   37.2   +1.2   42.7   in 2010   30.9   in 1943  
Average Temperature   45.3   46.9   45.5   -0.2   52.1   in 1945   39.1   in 1907  
Total Precipitation   3.76   2.91   2.83   +.93   6.74   in 1983   .08   in 1966  
Total Snow   0.0   0.0   1.0   -1.0   9.6   in 1996   0.0   in 2019  
Total HDD   350   322   349   +1   463   in 1907   227   in 1945  
Total CDD   0   0   0   +0   6   in 2002   0   in      
Avg Maximum Dew Point   41.6   43.1   40.2   +1.4   46.6   in 2010   31.1   in 1975  
Avg Minimum Dew Point   29.2   27.8   26.9   +2.2   35.7   in 2010   16.6   in 1992  
Average  Dew Point   35.4   35.4   33.6   +1.8   41.1   in 2010   24.3   in 1992  
    April 18, 2020     Record Record
Year-to-Date Summary   Observed   2019   Normal Depart Highest Lowest
Total Precipitation   14.52   15.42   15.20   -.68   26.01   in 1983   6.69   in 2012  
Total Snow (since Jul 1 18)   12.9   21.1   31.8   -18.9   84.1   in 1996   5.0   in 1998  
Total HDD (since Jul 1 18)   4575   5063   5126   -551   6059   in 1918   4121   in 2012  
Total CDD (since Jan 1)   0   0   0   +0   6   in 2002   0   in    
                             
Hour-by-Hour Weather For April 18, 2020  
Climate Weather for April 18  
Weather History For April 18  
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