449  
CDUS41 KLWX 160530  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
129 AM EDT TUE APR 16 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 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 73 1242 AM 87 1967 67 6 71  
MINIMUM 45 1049 PM 28 1997 42 3 45  
1971  
AVERAGE 59 54 5 58  
 
PRECIPITATION (IN)  
YESTERDAY 0.05 1.96 1983 0.11 -0.06 0.50  
MONTH TO DATE 0.97 1.77 -0.80 0.65  
SINCE MAR 1 5.52 5.15 0.37 2.44  
SINCE JAN 1 12.98 10.57 2.41 8.83  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 2014 0.0 0.0  
MONTH TO DATE 0.0 0.2 -0.2  
SINCE JUL 1 26.5 21.9 4.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 6 11 -5 7  
MONTH TO DATE 146 201 -55 209  
SINCE MAR 1 830 848 -18 988  
SINCE JUL 1 4335 4438 -103 4339  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 12 3 9 15  
SINCE MAR 1 12 6 6 15  
SINCE JAN 1 12 6 6 20    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 35 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 48 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 17.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 300 AM  
LOWEST 41 300 PM  
AVERAGE 67  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 91 2002  
MINIMUM TEMPERATURE (F) 42 28 1981  
 
 
SUNRISE AND SUNSET  
APRIL 16 2019.........SUNRISE 632 AM EDT SUNSET 748 PM EDT  
APRIL 17 2019.........SUNRISE 631 AM EDT SUNSET 749 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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