388  
CDUS41 KLWX 212130  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
430 PM EST THU FEB 21 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 21 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 53 359 PM 80 2018 48 5 80  
MINIMUM 31 758 AM 7 1972 27 4 59  
1968  
AVERAGE 42 37 5 70  
 
PRECIPITATION (IN)  
TODAY 0.00 0.93 2015 0.10 -0.10 0.02  
MONTH TO DATE 2.79 2.07 0.72 3.87  
SINCE DEC 1 12.51 7.71 4.80 6.43  
SINCE JAN 1 6.75 4.75 2.00 5.66  
 
SNOWFALL (IN)  
TODAY 0.0 8.9 2015 0.2 -0.2  
MONTH TO DATE 6.4 6.1 0.3  
SINCE JUL 1 24.9 17.4 7.5  
SNOW DEPTH 3  
 
DEGREE DAYS  
HEATING  
TODAY 23 28 -5 0  
MONTH TO DATE 570 621 -51 506  
SINCE DEC 1 2375 2489 -114 2432  
SINCE JUL 1 3333 3405 -72 3226  
 
COOLING  
TODAY 0 0 0 5  
MONTH TO DATE 0 0 0 5  
SINCE DEC 1 0 0 0 5  
SINCE JAN 1 0 0 0 5    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 7 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 10 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 0.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 800 AM  
LOWEST 54 400 PM  
AVERAGE 77  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 48 71 1991  
MINIMUM TEMPERATURE (F) 27 4 1968  
 
 
SUNRISE AND SUNSET  
FEBRUARY 21 2019......SUNRISE 654 AM EST SUNSET 554 PM EST  
FEBRUARY 22 2019......SUNRISE 652 AM EST SUNSET 555 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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