630  
CDUS41 KLWX 160525  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT THU MAY 16 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 15 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 74 227 PM 90 1962 75 -1 89  
MINIMUM 41 506 AM 37 2016 51 -10 63  
1984  
AVERAGE 58 63 -5 76  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.40 2003 0.16 -0.16 0.27  
MONTH TO DATE 4.00 2.11 1.89 2.90  
SINCE MAR 1 11.37 8.96 2.41 8.24  
SINCE JAN 1 18.83 14.38 4.45 14.63  
 
SNOWFALL (IN)  
YESTERDAY 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  
YESTERDAY 7 4 3 0  
MONTH TO DATE 51 84 -33 14  
SINCE MAR 1 933 1066 -133 1203  
SINCE JUL 1 4438 4656 -218 4554  
 
COOLING  
YESTERDAY 0 2 -2 11  
MONTH TO DATE 31 21 10 63  
SINCE MAR 1 53 41 12 78  
SINCE JAN 1 53 41 12 83    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 6.4  
 
 
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 89 500 AM  
LOWEST 29 300 PM  
AVERAGE 59  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 90 1998  
MINIMUM TEMPERATURE (F) 51 35 2000  
 
 
SUNRISE AND SUNSET  
MAY 16 2019...........SUNRISE 556 AM EDT SUNSET 816 PM EDT  
MAY 17 2019...........SUNRISE 556 AM EDT SUNSET 817 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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