408  
CDUS41 KLWX 240532  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1226 AM EST THU JAN 24 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 23 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 47 409 PM 72 1967 43 4 64  
MINIMUM 29 209 AM -4 1978 24 5 40  
1970  
AVERAGE 38 33 5 52  
 
PRECIPITATION (IN)  
YESTERDAY 0.01 1.88 2016 0.09 -0.08 0.13  
MONTH TO DATE 2.36 1.95 0.41 1.68  
SINCE DEC 1 8.12 4.91 3.21 2.45  
SINCE JAN 1 2.36 1.95 0.41 1.68  
 
SNOWFALL (IN)  
YESTERDAY 0.0 22.1 2016 0.2 -0.2  
MONTH TO DATE 12.4 5.0 7.4  
SINCE JUL 1 15.4 9.0 6.4  
SNOW DEPTH T  
 
DEGREE DAYS  
HEATING  
YESTERDAY 27 32 -5 13  
MONTH TO DATE 712 736 -24 776  
SINCE DEC 1 1516 1618 -102 1699  
SINCE JUL 1 2474 2534 -60 2493  
 
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 S (200)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 11.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 82 900 PM  
LOWEST 38 700 AM  
AVERAGE 60  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 73 1967  
MINIMUM TEMPERATURE (F) 24 -2 1987  
 
 
SUNRISE AND SUNSET  
JANUARY 24 2019.......SUNRISE 722 AM EST SUNSET 522 PM EST  
JANUARY 25 2019.......SUNRISE 722 AM EST SUNSET 523 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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