647  
CDUS41 KLWX 180528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
127 AM EDT MON MAR 18 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 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 52 458 PM 77 1963 56 -4 44  
MINIMUM 28 643 AM 16 1970 33 -5 23  
AVERAGE 40 44 -4 34  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.14 1993 0.11 -0.11 T  
MONTH TO DATE 1.80 1.70 0.10 0.24  
SINCE MAR 1 1.80 1.70 0.10 0.24  
SINCE JAN 1 9.26 7.12 2.14 6.63  
 
SNOWFALL (IN)  
YESTERDAY 0.0 4.5 2014 0.1 -0.1  
MONTH TO DATE 1.6 2.0 -0.4  
SINCE JUL 1 26.5 20.9 5.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 25 21 4 31  
MONTH TO DATE 411 395 16 460  
SINCE MAR 1 411 395 16 460  
SINCE JUL 1 3916 3985 -69 3811  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 0 0 0 0  
SINCE JAN 1 0 0 0 5    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 6.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 63 400 AM  
LOWEST 21 500 PM  
AVERAGE 42  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 56 80 1989  
MINIMUM TEMPERATURE (F) 33 13 1976  
 
 
SUNRISE AND SUNSET  
MARCH 18 2019.........SUNRISE 717 AM EDT SUNSET 720 PM EDT  
MARCH 19 2019.........SUNRISE 715 AM EDT SUNSET 721 PM EDT  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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