555  
CDUS41 KLWX 180631  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
130 AM EST FRI JAN 18 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 17 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 36 513 PM 70 1990 42 -6 32  
MINIMUM 28 727 AM -7 1982 24 4 17  
AVERAGE 32 33 -1 25  
 
PRECIPITATION (IN)  
YESTERDAY 0.12 1.14 1994 0.09 0.03 0.02  
MONTH TO DATE 1.25 1.42 -0.17 1.55  
SINCE DEC 1 7.01 4.38 2.63 2.32  
SINCE JAN 1 1.25 1.42 -0.17 1.55  
 
SNOWFALL (IN)  
YESTERDAY 1.5 4.2 1965 0.3 1.2  
MONTH TO DATE 12.1 3.5 8.6  
SINCE JUL 1 15.1 7.5 7.6  
SNOW DEPTH 4  
 
DEGREE DAYS  
HEATING  
YESTERDAY 33 32 1 40  
MONTH TO DATE 497 544 -47 649  
SINCE DEC 1 1301 1426 -125 1572  
SINCE JUL 1 2259 2342 -83 2366  
 
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 12 HIGHEST WIND DIRECTION SE (130)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION SE (130)  
AVERAGE WIND SPEED 4.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT SNOW  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 700 PM  
LOWEST 59 100 PM  
AVERAGE 80  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 70 1990  
MINIMUM TEMPERATURE (F) 24 -1 1994  
 
 
SUNRISE AND SUNSET  
JANUARY 18 2019.......SUNRISE 726 AM EST SUNSET 515 PM EST  
JANUARY 19 2019.......SUNRISE 725 AM EST SUNSET 516 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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