799  
CDUS41 KLWX 210537  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1235 AM EST THU FEB 21 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 20 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 34 502 AM 77 2018 48 -14 77  
MINIMUM 29 1225 PM -2 1979 27 2 47  
AVERAGE 32 37 -5 62  
 
PRECIPITATION (IN)  
YESTERDAY 0.87 1.02 1996 0.10 0.77 0.00  
MONTH TO DATE 2.79 1.97 0.82 3.85  
SINCE DEC 1 12.51 7.61 4.90 6.41  
SINCE JAN 1 6.75 4.65 2.10 5.64  
 
SNOWFALL (IN)  
YESTERDAY 4.7 R 0.7 1969 0.2 4.5  
MONTH TO DATE 6.4 5.9 0.5  
SINCE JUL 1 24.9 17.2 7.7  
SNOW DEPTH 1  
 
DEGREE DAYS  
HEATING  
YESTERDAY 33 28 5 3  
MONTH TO DATE 547 593 -46 506  
SINCE DEC 1 2352 2461 -109 2432  
SINCE JUL 1 3310 3377 -67 3226  
 
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 14 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 3.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
LT FREEZING RAIN  
HEAVY SNOW  
SNOW  
LIGHT SNOW  
SLEET  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 800 AM  
LOWEST 47 400 AM  
AVERAGE 70  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 48 80 2018  
MINIMUM TEMPERATURE (F) 27 7 1972  
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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