309  
CDUS41 KLWX 202124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
424 PM EST SUN JAN 20 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 20 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 40 935 AM 63 2006 42 -2 61  
MINIMUM 29 359 PM -7 1985 24 5 20  
AVERAGE 35 33 2 41  
 
PRECIPITATION (IN)  
TODAY 0.24 1.01 1979 0.09 0.15 0.00  
MONTH TO DATE 2.35 1.68 0.67 1.55  
SINCE DEC 1 8.11 4.64 3.47 2.32  
SINCE JAN 1 2.35 1.68 0.67 1.55  
 
SNOWFALL (IN)  
TODAY MM 4.6 2000 0.3 MM  
MONTH TO DATE 12.4 4.3 8.1  
SINCE JUL 1 15.4 8.3 7.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 30 32 -2 24  
MONTH TO DATE 586 640 -54 736  
SINCE DEC 1 1390 1522 -132 1659  
SINCE JUL 1 2348 2438 -90 2453  
 
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 37 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 49 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 17.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 53 400 PM  
AVERAGE 77  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 63 2018  
MINIMUM TEMPERATURE (F) 24 -16 1984  
 
 
SUNRISE AND SUNSET  
JANUARY 20 2019.......SUNRISE 725 AM EST SUNSET 517 PM EST  
JANUARY 21 2019.......SUNRISE 724 AM EST SUNSET 518 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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