078  
CDUS41 KLWX 140543  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1243 AM EST SUN FEB 14 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 13 2021
 
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
CLIMATE RECORD PERIOD: 1960 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 30 5:06 AM 65 1974 46 -16 55  
MINIMUM 27 11:59 PM -8 1983 26 1 39  
AVERAGE 29 36 -7 47  
 
PRECIPITATION (IN)  
YESTERDAY 0.21 1.29 1972 0.10 0.11 0.11  
MONTH TO DATE 1.26 1.28 -0.02 2.13  
SINCE DEC 1 8.95 6.92 2.03 8.43  
SINCE JAN 1 3.14 3.96 -0.82 5.46  
 
SNOWFALL (IN)  
YESTERDAY 0.2 11.7 2014 0.3 -0.1 0.0  
MONTH TO DATE 5.2 4.0 1.2 T  
SINCE DEC 1 10.8 14.8 -4.0 2.9  
SINCE JUL 1 10.8 15.3 -4.5 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 36 29 7 18  
MONTH TO DATE 395 393 2 254  
SINCE DEC 1 2101 2261 -160 1858  
SINCE JUL 1 2768 3177 -409 2721  
 
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 N (360)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION N (340)  
AVERAGE WIND SPEED 7.9  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FREEZING RAIN  
LT FREEZING RAIN  
SLEET  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 10:00 PM  
LOWEST 66 5:00 AM  
AVERAGE 79  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 46 71 1990  
MINIMUM TEMPERATURE (F) 26 -5 1979  
 
SUNRISE AND SUNSET  
FEBRUARY 14 2021......SUNRISE 7:02 AM EST SUNSET 5:46 PM EST  
FEBRUARY 15 2021......SUNRISE 7:01 AM EST SUNSET 5:48 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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