263  
CDUS41 KLWX 102131  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
430 PM EST THU JAN 10 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 10 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 35 239 PM 59 2016 42 -7 43  
MINIMUM 28 732 AM 0 1982 24 4 20  
AVERAGE 32 33 -1 32  
 
PRECIPITATION (IN)  
TODAY 0.00 1.00 2016 0.08 -0.08 0.00  
MONTH TO DATE 0.25 0.81 -0.56 0.07  
SINCE DEC 1 6.01 3.77 2.24 0.84  
SINCE JAN 1 0.25 0.81 -0.56 0.07  
 
SNOWFALL (IN)  
TODAY 0.0 6.2 1965 0.2 -0.2  
MONTH TO DATE T 1.8 -1.8  
SINCE JUL 1 3.0 5.8 -2.8  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 33 32 1 33  
MONTH TO DATE 236 320 -84 446  
SINCE DEC 1 1040 1202 -162 1369  
SINCE JUL 1 1998 2118 -120 2163  
 
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 35 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 48 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 22.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 53 1200 AM  
LOWEST 41 200 PM  
AVERAGE 47  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 71 1975  
MINIMUM TEMPERATURE (F) 24 -5 1988  
 
 
SUNRISE AND SUNSET  
JANUARY 10 2019.......SUNRISE 728 AM EST SUNSET 506 PM EST  
JANUARY 11 2019.......SUNRISE 728 AM EST SUNSET 507 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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