769  
CDUS41 KLWX 190534  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1232 AM EST SAT JAN 19 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 18 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 43 319 PM 70 1990 42 1 46  
MINIMUM 30 1147 PM -1 1994 24 6 16  
AVERAGE 37 33 4 31  
 
PRECIPITATION (IN)  
YESTERDAY 0.02 1.18 1980 0.08 -0.06 0.00  
MONTH TO DATE 1.27 1.50 -0.23 1.55  
SINCE DEC 1 7.03 4.46 2.57 2.32  
SINCE JAN 1 1.27 1.50 -0.23 1.55  
 
SNOWFALL (IN)  
YESTERDAY 0.3 4.2 1984 0.2 0.1  
MONTH TO DATE 12.4 3.7 8.7  
SINCE JUL 1 15.4 7.7 7.7  
SNOW DEPTH 5  
 
DEGREE DAYS  
HEATING  
YESTERDAY 28 32 -4 34  
MONTH TO DATE 525 576 -51 683  
SINCE DEC 1 1329 1458 -129 1606  
SINCE JUL 1 2287 2374 -87 2400  
 
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 10 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 11 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 1.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT SNOW  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 85 100 PM  
AVERAGE 93  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 65 1972  
MINIMUM TEMPERATURE (F) 24 -6 1994  
 
 
SUNRISE AND SUNSET  
JANUARY 19 2019.......SUNRISE 725 AM EST SUNSET 516 PM EST  
JANUARY 20 2019.......SUNRISE 725 AM EST SUNSET 517 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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