259  
CDUS41 KLWX 092134  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
433 PM EST WED JAN 9 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 9 2019
 
 
VALID TODAY AS OF 0400 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 51 1233 AM 64 2008 42 9 50  
MINIMUM 36 359 PM -8 1970 24 12 22  
AVERAGE 44 33 11 36  
 
PRECIPITATION (IN)  
TODAY T 1.39 1964 0.08 -0.08 0.00  
MONTH TO DATE 0.25 0.73 -0.48 0.07  
SINCE DEC 1 6.01 3.69 2.32 0.84  
SINCE JAN 1 0.25 0.73 -0.48 0.07  
 
SNOWFALL (IN)  
TODAY T 3.5 1997 0.2 -0.2  
MONTH TO DATE T 1.6 -1.6  
SINCE JUL 1 3.0 5.6 -2.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 21 32 -11 29  
MONTH TO DATE 200 288 -88 413  
SINCE DEC 1 1004 1170 -166 1336  
SINCE JUL 1 1962 2086 -124 2130  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 33 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 44 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 18.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 76 300 PM  
LOWEST 45 600 AM  
AVERAGE 61  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 59 2016  
MINIMUM TEMPERATURE (F) 24 0 1982  
 
 
SUNRISE AND SUNSET  
JANUARY 9 2019.......SUNRISE 729 AM EST SUNSET 505 PM EST  
JANUARY 10 2019.......SUNRISE 728 AM EST SUNSET 506 PM EST  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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