368  
CDUS41 KLWX 222123  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
423 PM EST WED NOV 22 2017  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 22 2017
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 56 1022 AM 75 2007 55 1 48  
MINIMUM 45 547 AM 14 2014 34 11 26  
1964  
AVERAGE 51 44 7 37  
 
PRECIPITATION (IN)  
TODAY 0.00 1.54 1991 0.11 -0.11 0.00  
MONTH TO DATE 1.96 2.49 -0.53 0.25  
SINCE SEP 1 6.86 9.66 -2.80 3.45  
SINCE JAN 1 39.86 37.66 2.20 31.45  
 
SNOWFALL (IN)  
TODAY 0.0 2.2 1989 0.0 0.0  
MONTH TO DATE 0.0 0.2 -0.2  
SINCE JUL 1 T 0.2 -0.2  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 14 21 -7 28  
MONTH TO DATE 396 379 17 355  
SINCE SEP 1 616 733 -117 566  
SINCE JUL 1 617 735 -118 566  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 1 0 1 2  
SINCE SEP 1 220 160 60 296  
SINCE JAN 1 1281 1176 105 1559    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 30 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 12.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 600 AM  
LOWEST 41 200 PM  
AVERAGE 64  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 54 70 1990  
MINIMUM TEMPERATURE (F) 33 14 1984  
1964  
 
 
SUNRISE AND SUNSET  
NOVEMBER 22 2017......SUNRISE 700 AM EST SUNSET 451 PM EST  
NOVEMBER 23 2017......SUNRISE 702 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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