817  
CDUS41 KLWX 172129  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
428 PM EST SUN FEB 17 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 17 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 39 343 PM 75 1976 47 -8 42  
MINIMUM 23 732 AM -4 1979 26 -3 29  
AVERAGE 31 36 -5 36  
 
PRECIPITATION (IN)  
TODAY 0.00 1.36 1998 0.10 -0.10 0.44  
MONTH TO DATE 1.51 1.68 -0.17 3.81  
SINCE DEC 1 11.23 7.32 3.91 6.37  
SINCE JAN 1 5.47 4.36 1.11 5.60  
 
SNOWFALL (IN)  
TODAY 0.0 4.1 1967 0.3 -0.3  
MONTH TO DATE 1.7 5.1 -3.4  
SINCE JUL 1 20.2 16.4 3.8  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 34 29 5 29  
MONTH TO DATE 459 509 -50 456  
SINCE DEC 1 2264 2377 -113 2382  
SINCE JUL 1 3222 3293 -71 3176  
 
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 13 HIGHEST WIND DIRECTION S (160)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION S (160)  
AVERAGE WIND SPEED 4.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 75 400 AM  
LOWEST 52 200 PM  
AVERAGE 64  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 47 75 2011  
MINIMUM TEMPERATURE (F) 26 -14 1979  
 
 
SUNRISE AND SUNSET  
FEBRUARY 17 2019......SUNRISE 659 AM EST SUNSET 549 PM EST  
FEBRUARY 18 2019......SUNRISE 658 AM EST SUNSET 550 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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