128  
CDUS41 KLWX 212126  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
526 PM EDT TUE MAY 21 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 21 2019
 
 
VALID TODAY AS OF 0500 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 71 351 PM 92 1996 76 -5 82  
MINIMUM 59 618 AM 33 1992 53 6 63  
AVERAGE 65 64 1 73  
 
PRECIPITATION (IN)  
TODAY 0.00 1.06 2003 0.16 -0.16 0.00  
MONTH TO DATE 4.04 3.03 1.01 5.67  
SINCE MAR 1 11.41 9.88 1.53 11.01  
SINCE JAN 1 18.87 15.30 3.57 17.40  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0  
SINCE JUL 1 26.5 22.0 4.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 3 -3 0  
MONTH TO DATE 52 106 -54 21  
SINCE MAR 1 934 1088 -154 1210  
SINCE JUL 1 4439 4678 -239 4561  
 
COOLING  
TODAY 0 3 -3 8  
MONTH TO DATE 66 36 30 90  
SINCE MAR 1 88 56 32 105  
SINCE JAN 1 88 56 32 110    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 11.4  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 64 400 AM  
LOWEST 31 300 PM  
AVERAGE 48  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 88 2004  
1984  
1975  
MINIMUM TEMPERATURE (F) 53 31 2002  
 
 
SUNRISE AND SUNSET  
MAY 21 2019...........SUNRISE 553 AM EDT SUNSET 821 PM EDT  
MAY 22 2019...........SUNRISE 552 AM EDT SUNSET 822 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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