432  
CDUS41 KLWX 012123  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
423 PM EST SAT DEC 1 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 1 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 42 1038 AM 75 2006 51 -9 54  
MINIMUM 28 208 AM 4 1967 31 -3 29  
AVERAGE 35 41 -6 42  
 
PRECIPITATION (IN)  
TODAY 0.15 2.02 1974 0.11 0.04 0.00  
MONTH TO DATE 0.15 0.11 0.04 0.00  
SINCE DEC 1 0.15 0.11 0.04 0.00  
SINCE JAN 1 61.13 38.69 22.44 39.89  
 
SNOWFALL (IN)  
TODAY 0.0 T 1992 0.1 -0.1  
1981  
1974  
MONTH TO DATE 0.0 0.1 -0.1  
SINCE JUL 1 3.0 0.6 2.4  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 30 24 6 23  
MONTH TO DATE 30 24 6 23  
SINCE DEC 1 30 24 6 23  
SINCE JUL 1 988 940 48 817  
 
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 7 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 9 HIGHEST GUST DIRECTION E (100)  
AVERAGE WIND SPEED 1.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 79 1100 AM  
AVERAGE 90  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 51 75 1970  
MINIMUM TEMPERATURE (F) 31 0 1967  
 
 
SUNRISE AND SUNSET  
DECEMBER 1 2018......SUNRISE 709 AM EST SUNSET 448 PM EST  
DECEMBER 2 2018......SUNRISE 710 AM EST SUNSET 448 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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