906  
CDUS41 KLWX 272122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
422 PM EST THU DEC 27 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 27 2018
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 50 248 PM 73 1971 43 7 31  
MINIMUM 24 708 AM 1 1989 25 -1 17  
AVERAGE 37 34 3 24  
 
PRECIPITATION (IN)  
TODAY 0.00 1.04 1964 0.08 -0.08 T  
MONTH TO DATE 4.14 2.65 1.49 0.74  
SINCE DEC 1 4.14 2.65 1.49 0.74  
SINCE JAN 1 65.12 41.23 23.89 40.63  
 
SNOWFALL (IN)  
TODAY 0.0 4.4 1990 0.1 -0.1  
MONTH TO DATE T 2.9 -2.9  
SINCE JUL 1 3.0 3.4 -0.4  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 28 31 -3 41  
MONTH TO DATE 713 758 -45 742  
SINCE DEC 1 713 758 -45 742  
SINCE JUL 1 1671 1674 -3 1536  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1522 1178 344 1281    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 3.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 700 AM  
LOWEST 46 100 PM  
AVERAGE 73  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 73 1984  
MINIMUM TEMPERATURE (F) 25 8 1966  
 
 
SUNRISE AND SUNSET  
DECEMBER 27 2018......SUNRISE 727 AM EST SUNSET 455 PM EST  
DECEMBER 28 2018......SUNRISE 728 AM EST SUNSET 455 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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