206  
CDUS41 KLWX 232129  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
429 PM EST SUN DEC 23 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 23 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 46 349 PM 68 1990 44 2 62  
MINIMUM 28 630 AM 4 1989 25 3 39  
AVERAGE 37 35 2 51  
 
PRECIPITATION (IN)  
TODAY 0.00 1.30 2004 0.09 -0.09 0.34  
MONTH TO DATE 4.12 2.30 1.82 0.74  
SINCE DEC 1 4.12 2.30 1.82 0.74  
SINCE JAN 1 65.10 40.88 24.22 40.63  
 
SNOWFALL (IN)  
TODAY 0.0 7.5 1963 0.1 -0.1  
MONTH TO DATE T 2.3 -2.3  
SINCE JUL 1 3.0 2.8 0.2  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 28 30 -2 14  
MONTH TO DATE 600 634 -34 609  
SINCE DEC 1 600 634 -34 609  
SINCE JUL 1 1558 1550 8 1403  
 
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 13 HIGHEST WIND DIRECTION S (180)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 4.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 400 AM  
LOWEST 53 100 PM  
AVERAGE 77  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 44 71 2015  
MINIMUM TEMPERATURE (F) 25 1 1983  
 
 
SUNRISE AND SUNSET  
DECEMBER 23 2018......SUNRISE 726 AM EST SUNSET 452 PM EST  
DECEMBER 24 2018......SUNRISE 726 AM EST SUNSET 453 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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