078  
CDUS41 KLWX 182130  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
429 PM EST FRI JAN 18 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 18 2019
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 43 319 PM 70 1990 42 1 46  
MINIMUM 32 729 AM -1 1994 24 8 16  
AVERAGE 38 33 5 31  
 
PRECIPITATION (IN)  
TODAY 0.04 1.18 1980 0.08 -0.04 0.00  
MONTH TO DATE 1.29 1.50 -0.21 1.55  
SINCE DEC 1 7.05 4.46 2.59 2.32  
SINCE JAN 1 1.29 1.50 -0.21 1.55  
 
SNOWFALL (IN)  
TODAY 0.3 4.2 1984 0.2 0.1  
MONTH TO DATE 12.4 3.7 8.7  
SINCE JUL 1 15.4 7.7 7.7  
SNOW DEPTH 5  
 
DEGREE DAYS  
HEATING  
TODAY 27 32 -5 34  
MONTH TO DATE 524 576 -52 683  
SINCE DEC 1 1328 1458 -130 1606  
SINCE JUL 1 2286 2374 -88 2400  
 
COOLING  
TODAY 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 6 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 6 HIGHEST GUST DIRECTION E (100)  
AVERAGE WIND SPEED 1.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT SNOW  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 85 100 PM  
AVERAGE 93  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 65 1972  
MINIMUM TEMPERATURE (F) 24 -6 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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