085  
CDUS41 KLWX 070526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1225 AM EST MON JAN 7 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 6 2019
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2019  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 54 313 PM 71 2007 42 12 19  
MINIMUM 29 724 AM 4 1999 24 5 8  
1977  
AVERAGE 42 33 9 14  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.94 1995 0.08 -0.08 0.00  
MONTH TO DATE 0.14 0.48 -0.34 0.02  
SINCE DEC 1 5.90 3.44 2.46 0.79  
SINCE JAN 1 0.14 0.48 -0.34 0.02  
 
SNOWFALL (IN)  
YESTERDAY 0.0 4.2 2015 0.2 -0.2  
MONTH TO DATE 0.0 1.0 -1.0  
SINCE JUL 1 3.0 5.0 -2.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 23 32 -9 51  
MONTH TO DATE 132 192 -60 292  
SINCE DEC 1 936 1074 -138 1215  
SINCE JUL 1 1894 1990 -96 2009  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 37 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 8.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 500 AM  
LOWEST 41 300 PM  
AVERAGE 71  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 71 2008  
MINIMUM TEMPERATURE (F) 24 -1 2018  
 
 
SUNRISE AND SUNSET  
JANUARY 7 2019.......SUNRISE 729 AM EST SUNSET 504 PM EST  
JANUARY 8 2019.......SUNRISE 729 AM EST SUNSET 504 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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