646  
CDUS41 KLWX 232137  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
436 PM EST WED JAN 23 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 23 2019
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 47 352 PM 72 1967 43 4 64  
MINIMUM 29 209 AM -4 1978 24 5 40  
1970  
AVERAGE 38 33 5 52  
 
PRECIPITATION (IN)  
TODAY 0.00 1.88 2016 0.09 -0.09 0.13  
MONTH TO DATE 2.35 1.95 0.40 1.68  
SINCE DEC 1 8.11 4.91 3.20 2.45  
SINCE JAN 1 2.35 1.95 0.40 1.68  
 
SNOWFALL (IN)  
TODAY 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 0  
 
DEGREE DAYS  
HEATING  
TODAY 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  
TODAY 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 13.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 65 200 PM  
LOWEST 38 700 AM  
AVERAGE 52  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 73 1967  
MINIMUM TEMPERATURE (F) 24 -2 1987  
 
 
SUNRISE AND SUNSET  
JANUARY 23 2019.......SUNRISE 723 AM EST SUNSET 520 PM EST  
JANUARY 24 2019.......SUNRISE 722 AM EST SUNSET 522 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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