779  
CDUS41 KLWX 130535  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
131 AM EDT MON MAY 13 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 12 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 58 617 AM 90 2018 74 -16 90  
MINIMUM 49 1159 PM 34 1969 50 -1 61  
AVERAGE 54 62 -8 76  
 
PRECIPITATION (IN)  
YESTERDAY 0.57 1.37 1974 0.15 0.42 T  
MONTH TO DATE 3.50 1.64 1.86 0.24  
SINCE MAR 1 10.87 8.49 2.38 5.58  
SINCE JAN 1 18.33 13.91 4.42 11.97  
 
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 11 5 6 0  
MONTH TO DATE 21 71 -50 14  
SINCE MAR 1 903 1053 -150 1203  
SINCE JUL 1 4408 4643 -235 4554  
 
COOLING  
YESTERDAY 0 2 -2 11  
MONTH TO DATE 31 15 16 44  
SINCE MAR 1 53 35 18 59  
SINCE JAN 1 53 35 18 64    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION E (70)  
AVERAGE WIND SPEED 9.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 200 AM  
LOWEST 86 1200 PM  
AVERAGE 93  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 74 92 2000  
MINIMUM TEMPERATURE (F) 50 32 1976  
 
 
SUNRISE AND SUNSET  
MAY 13 2019...........SUNRISE 559 AM EDT SUNSET 814 PM EDT  
MAY 14 2019...........SUNRISE 558 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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