900  
CDUS41 KLWX 020529  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1229 AM EST WED JAN 2 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 1 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 62 804 AM 68 2005 43 19 23  
MINIMUM 40 1158 PM -6 1968 24 16 6  
AVERAGE 51 33 18 15  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.73 2003 0.08 -0.08 0.00  
MONTH TO DATE 0.00 0.08 -0.08 0.00  
SINCE DEC 1 5.76 3.04 2.72 0.77  
SINCE JAN 1 0.00 0.08 -0.08 0.00  
 
SNOWFALL (IN)  
YESTERDAY 0.0 6.9 1971 0.2 -0.2  
MONTH TO DATE 0.0 0.2 -0.2  
SINCE JUL 1 3.0 4.2 -1.2  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 14 32 -18 50  
MONTH TO DATE 14 32 -18 50  
SINCE DEC 1 818 914 -96 973  
SINCE JUL 1 1776 1830 -54 1767  
 
COOLING  
YESTERDAY 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 30 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 12.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 57 1200 PM  
AVERAGE 79  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 67 2000  
MINIMUM TEMPERATURE (F) 24 -7 1968  
 
 
SUNRISE AND SUNSET  
JANUARY 2 2019.......SUNRISE 729 AM EST SUNSET 459 PM EST  
JANUARY 3 2019.......SUNRISE 729 AM EST SUNSET 500 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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