812  
CDUS41 KLWX 292124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
423 PM EST TUE JAN 29 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 29 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 36 124 PM 75 1975 43 -7 46  
MINIMUM 26 1210 AM -1 1987 24 2 33  
1963  
AVERAGE 31 34 -3 40  
 
PRECIPITATION (IN)  
TODAY 0.12 0.95 1990 0.09 0.03 0.00  
MONTH TO DATE 3.81 2.49 1.32 1.79  
SINCE DEC 1 9.57 5.45 4.12 2.56  
SINCE JAN 1 3.81 2.49 1.32 1.79  
 
SNOWFALL (IN)  
TODAY 1.8 7.2 1966 0.3 1.5  
MONTH TO DATE 14.2 6.7 7.5  
SINCE JUL 1 17.2 10.7 6.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 34 31 3 25  
MONTH TO DATE 899 925 -26 928  
SINCE DEC 1 1703 1807 -104 1851  
SINCE JUL 1 2661 2723 -62 2645  
 
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 14 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 5.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
HEAVY SNOW  
SNOW  
LIGHT SNOW  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 400 PM  
LOWEST 53 100 AM  
AVERAGE 77  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 72 2013  
MINIMUM TEMPERATURE (F) 24 2 1965  
 
 
SUNRISE AND SUNSET  
JANUARY 29 2019.......SUNRISE 719 AM EST SUNSET 527 PM EST  
JANUARY 30 2019.......SUNRISE 718 AM EST SUNSET 529 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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