939  
CDUS41 KLWX 252124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
422 PM EST TUE DEC 25 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 25 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 41 203 PM 71 1982 44 -3 39  
1964  
MINIMUM 28 702 AM -4 1989 25 3 26  
AVERAGE 35 34 1 33  
 
PRECIPITATION (IN)  
TODAY 0.00 0.82 1969 0.09 -0.09 T  
MONTH TO DATE 4.14 2.48 1.66 0.74  
SINCE DEC 1 4.14 2.48 1.66 0.74  
SINCE JAN 1 65.12 41.06 24.06 40.63  
 
SNOWFALL (IN)  
TODAY 0.0 6.0 1969 0.1 -0.1  
MONTH TO DATE T 2.6 -2.6  
SINCE JUL 1 3.0 3.1 -0.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 30 31 -1 32  
MONTH TO DATE 654 696 -42 667  
SINCE DEC 1 654 696 -42 667  
SINCE JUL 1 1612 1612 0 1461  
 
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 12 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 4.3  
 
 
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 78 400 AM  
LOWEST 48 1100 AM  
AVERAGE 63  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 71 1964  
MINIMUM TEMPERATURE (F) 25 -1 1983  
 
 
SUNRISE AND SUNSET  
DECEMBER 25 2018......SUNRISE 727 AM EST SUNSET 453 PM EST  
DECEMBER 26 2018......SUNRISE 727 AM EST SUNSET 454 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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