172  
CDUS41 KLWX 140532  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
130 AM EDT TUE MAY 14 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 13 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 58 532 PM 92 2000 74 -16 73  
MINIMUM 48 542 AM 32 1976 50 -2 60  
AVERAGE 53 62 -9 67  
 
PRECIPITATION (IN)  
YESTERDAY 0.50 1.93 1971 0.15 0.35 0.52  
MONTH TO DATE 4.00 1.79 2.21 0.76  
SINCE MAR 1 11.37 8.64 2.73 6.10  
SINCE JAN 1 18.83 14.06 4.77 12.49  
 
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 12 5 7 0  
MONTH TO DATE 33 76 -43 14  
SINCE MAR 1 915 1058 -143 1203  
SINCE JUL 1 4420 4648 -228 4554  
 
COOLING  
YESTERDAY 0 2 -2 2  
MONTH TO DATE 31 17 14 46  
SINCE MAR 1 53 37 16 61  
SINCE JAN 1 53 37 16 66    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 4.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 1200 AM  
LOWEST 72 500 PM  
AVERAGE 83  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 89 2010  
MINIMUM TEMPERATURE (F) 51 32 2013  
1996  
 
 
SUNRISE AND SUNSET  
MAY 14 2019...........SUNRISE 558 AM EDT SUNSET 815 PM EDT  
MAY 15 2019...........SUNRISE 557 AM EDT SUNSET 815 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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