239  
CDUS41 KLWX 162125  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
424 PM EST WED JAN 16 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 16 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 41 349 PM 65 1974 42 -1 39  
MINIMUM 12 742 AM -4 1964 24 -12 25  
AVERAGE 27 33 -6 32  
 
PRECIPITATION (IN)  
TODAY 0.00 0.64 1991 0.08 -0.08 T  
MONTH TO DATE 1.13 1.33 -0.20 1.53  
SINCE DEC 1 6.89 4.29 2.60 2.30  
SINCE JAN 1 1.13 1.33 -0.20 1.53  
 
SNOWFALL (IN)  
TODAY 0.0 2.3 1965 0.2 -0.2  
MONTH TO DATE 10.6 3.2 7.4  
SINCE JUL 1 13.6 7.2 6.4  
SNOW DEPTH 5  
 
DEGREE DAYS  
HEATING  
TODAY 38 32 6 33  
MONTH TO DATE 464 512 -48 609  
SINCE DEC 1 1268 1394 -126 1532  
SINCE JUL 1 2226 2310 -84 2326  
 
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 21 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 3.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 55 200 PM  
AVERAGE 78  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 70 1990  
MINIMUM TEMPERATURE (F) 24 -7 1982  
 
 
SUNRISE AND SUNSET  
JANUARY 16 2019.......SUNRISE 727 AM EST SUNSET 513 PM EST  
JANUARY 17 2019.......SUNRISE 726 AM EST SUNSET 514 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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