998  
CDUS41 KLWX 202131  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
531 PM EDT MON MAY 20 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 20 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 88 356 PM 93 1996 76 12 87  
MINIMUM 70 605 AM 36 2002 52 18 67  
AVERAGE 79 64 15 77  
 
PRECIPITATION (IN)  
TODAY T 1.86 2005 0.15 -0.15 0.00  
MONTH TO DATE 4.04 2.87 1.17 5.67  
SINCE MAR 1 11.41 9.72 1.69 11.01  
SINCE JAN 1 18.87 15.14 3.73 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 52 103 -51 21  
SINCE MAR 1 934 1085 -151 1210  
SINCE JUL 1 4439 4675 -236 4561  
 
COOLING  
TODAY 14 3 11 12  
MONTH TO DATE 66 33 33 82  
SINCE MAR 1 88 53 35 97  
SINCE JAN 1 88 53 35 102    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 10.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 78 600 AM  
LOWEST 43 200 PM  
AVERAGE 61  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 76 92 1996  
MINIMUM TEMPERATURE (F) 53 33 1992  
 
 
SUNRISE AND SUNSET  
MAY 20 2019...........SUNRISE 553 AM EDT SUNSET 820 PM EDT  
MAY 21 2019...........SUNRISE 553 AM EDT SUNSET 821 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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