808  
CDUS41 KLWX 220531  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1231 AM EST TUE JAN 22 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 21 2019
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2019  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 21 401 PM 63 2018 43 -22 63  
MINIMUM 12 816 AM -16 1984 24 -12 28  
AVERAGE 17 33 -16 46  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.94 1974 0.09 -0.09 T  
MONTH TO DATE 2.35 1.77 0.58 1.55  
SINCE DEC 1 8.11 4.73 3.38 2.32  
SINCE JAN 1 2.35 1.77 0.58 1.55  
 
SNOWFALL (IN)  
YESTERDAY 0.0 8.5 2014 0.2 -0.2  
MONTH TO DATE 12.4 4.5 7.9  
SINCE JUL 1 15.4 8.5 6.9  
SNOW DEPTH T  
 
DEGREE DAYS  
HEATING  
YESTERDAY 48 32 16 19  
MONTH TO DATE 641 672 -31 755  
SINCE DEC 1 1445 1554 -109 1678  
SINCE JUL 1 2403 2470 -67 2472  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 36 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 46 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 18.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 67 500 AM  
LOWEST 36 400 PM  
AVERAGE 52  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 68 1986  
MINIMUM TEMPERATURE (F) 24 -18 1984  
 
 
SUNRISE AND SUNSET  
JANUARY 22 2019.......SUNRISE 724 AM EST SUNSET 519 PM EST  
JANUARY 23 2019.......SUNRISE 723 AM EST SUNSET 520 PM EST  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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