395  
CDUS41 KLWX 210531  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1227 AM EST WED NOV 21 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 20 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 52 200 PM 79 1985 56 -4 51  
MINIMUM 35 1156 PM 18 1980 34 1 35  
AVERAGE 44 45 -1 43  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.75 1983 0.11 -0.11 0.00  
MONTH TO DATE 5.87 2.26 3.61 1.96  
SINCE SEP 1 15.91 9.43 6.48 6.86  
SINCE JAN 1 59.17 37.43 21.74 39.86  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 2000 0.0 0.0  
1987  
1969  
MONTH TO DATE 3.0 0.1 2.9  
SINCE JUL 1 3.0 0.1 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 21 20 1 22  
MONTH TO DATE 386 338 48 364  
SINCE SEP 1 682 692 -10 584  
SINCE JUL 1 682 694 -12 585  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 1  
SINCE SEP 1 338 160 178 220  
SINCE JAN 1 1522 1176 346 1281    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 34 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 9.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 1200 AM  
LOWEST 50 200 PM  
AVERAGE 72  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 55 76 2007  
MINIMUM TEMPERATURE (F) 34 16 1969  
 
 
SUNRISE AND SUNSET  
NOVEMBER 21 2018......SUNRISE 659 AM EST SUNSET 452 PM EST  
NOVEMBER 22 2018......SUNRISE 700 AM EST SUNSET 451 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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