096  
CDUS41 KLWX 031235  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
734 AM EST THU JAN 3 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 2 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 45 317 PM 67 2000 43 2 25  
MINIMUM 37 454 AM -7 1968 24 13 7  
AVERAGE 41 33 8 16  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.40 1979 0.08 -0.08 0.00  
MONTH TO DATE 0.00 0.16 -0.16 0.00  
SINCE DEC 1 5.76 3.12 2.64 0.77  
SINCE JAN 1 0.00 0.16 -0.16 0.00  
 
SNOWFALL (IN)  
YESTERDAY 0.0 3.0 2014 0.1 -0.1  
1987  
MONTH TO DATE 0.0 0.3 -0.3  
SINCE JUL 1 3.0 4.3 -1.3  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 24 32 -8 49  
MONTH TO DATE 38 64 -26 99  
SINCE DEC 1 842 946 -104 1022  
SINCE JUL 1 1800 1862 -62 1816  
 
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 12 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 4.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 400 AM  
LOWEST 65 400 PM  
AVERAGE 79  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 68 2000  
MINIMUM TEMPERATURE (F) 24 1 2018  
 
 
SUNRISE AND SUNSET  
JANUARY 3 2019.......SUNRISE 729 AM EST SUNSET 500 PM EST  
JANUARY 4 2019.......SUNRISE 729 AM EST SUNSET 501 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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