018  
CDUS41 KLWX 020529  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1227 AM EST SUN DEC 2 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 1 2018
 
 
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)  
YESTERDAY  
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)  
YESTERDAY 0.21 2.02 1974 0.11 0.10 0.00  
MONTH TO DATE 0.21 0.11 0.10 0.00  
SINCE DEC 1 0.21 0.11 0.10 0.00  
SINCE JAN 1 61.19 38.69 22.50 39.89  
 
SNOWFALL (IN)  
YESTERDAY 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  
YESTERDAY 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  
YESTERDAY 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 1.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 79 1100 AM  
AVERAGE 90  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 51 75 1970  
MINIMUM TEMPERATURE (F) 31 0 1967  
 
 
SUNRISE AND SUNSET  
DECEMBER 2 2018......SUNRISE 710 AM EST SUNSET 448 PM EST  
DECEMBER 3 2018......SUNRISE 711 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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