334  
CDUS41 KLWX 060525  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1225 AM EST SUN JAN 6 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 5 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 53 423 PM 69 1997 42 11 19  
MINIMUM 40 1159 PM 5 1970 24 16 10  
AVERAGE 47 33 14 15  
 
PRECIPITATION (IN)  
YESTERDAY 0.11 1.11 1993 0.09 0.02 0.00  
MONTH TO DATE 0.14 0.40 -0.26 0.02  
SINCE DEC 1 5.90 3.36 2.54 0.79  
SINCE JAN 1 0.14 0.40 -0.26 0.02  
 
SNOWFALL (IN)  
YESTERDAY 0.0 6.4 1980 0.1 -0.1  
MONTH TO DATE 0.0 0.8 -0.8  
SINCE JUL 1 3.0 4.8 -1.8  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 18 32 -14 50  
MONTH TO DATE 109 160 -51 241  
SINCE DEC 1 913 1042 -129 1164  
SINCE JUL 1 1871 1958 -87 1958  
 
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 25 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 8.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 100 AM  
LOWEST 59 400 PM  
AVERAGE 80  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 71 2007  
MINIMUM TEMPERATURE (F) 24 4 1999  
1977  
 
 
SUNRISE AND SUNSET  
JANUARY 6 2019.......SUNRISE 729 AM EST SUNSET 503 PM EST  
JANUARY 7 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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