725  
CDUS41 KLWX 230537  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1230 AM EST WED JAN 23 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 22 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 32 303 PM 68 1986 43 -11 66  
MINIMUM 10 546 AM -18 1984 24 -14 48  
AVERAGE 21 33 -12 57  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.18 1987 0.09 -0.09 T  
MONTH TO DATE 2.35 1.86 0.49 1.55  
SINCE DEC 1 8.11 4.82 3.29 2.32  
SINCE JAN 1 2.35 1.86 0.49 1.55  
 
SNOWFALL (IN)  
YESTERDAY 0.0 11.1 1987 0.3 -0.3  
MONTH TO DATE 12.4 4.8 7.6  
SINCE JUL 1 15.4 8.8 6.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 44 32 12 8  
MONTH TO DATE 685 704 -19 763  
SINCE DEC 1 1489 1586 -97 1686  
SINCE JUL 1 2447 2502 -55 2480  
 
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 13 HIGHEST WIND DIRECTION S (180)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 5.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 73 500 AM  
LOWEST 31 200 PM  
AVERAGE 52  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 72 1967  
MINIMUM TEMPERATURE (F) 24 -4 1978  
1970  
 
 
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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