360  
CDUS41 KLWX 122141  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
439 PM EST SAT JAN 12 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 12 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 34 159 PM 70 2018 42 -8 70  
2017  
MINIMUM 23 507 AM -4 1977 24 -1 58  
AVERAGE 29 33 -4 64  
 
PRECIPITATION (IN)  
TODAY T 0.91 2018 0.09 -0.09 0.91  
MONTH TO DATE 0.25 0.99 -0.74 0.98  
SINCE DEC 1 6.01 3.95 2.06 1.75  
SINCE JAN 1 0.25 0.99 -0.74 0.98  
 
SNOWFALL (IN)  
TODAY T 6.1 1996 0.2 -0.2  
MONTH TO DATE T 2.2 -2.2  
SINCE JUL 1 3.0 6.2 -3.2  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 36 32 4 1  
MONTH TO DATE 308 384 -76 462  
SINCE DEC 1 1112 1266 -154 1385  
SINCE JUL 1 2070 2182 -112 2179  
 
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 9 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 2.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT SNOW  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 88 500 AM  
LOWEST 51 1100 AM  
AVERAGE 70  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 69 2005  
MINIMUM TEMPERATURE (F) 24 -3 1981  
1977  
 
 
SUNRISE AND SUNSET  
JANUARY 12 2019.......SUNRISE 728 AM EST SUNSET 508 PM EST  
JANUARY 13 2019.......SUNRISE 728 AM EST SUNSET 509 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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