351  
CDUS41 KLWX 200522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1222 AM EST SAT FEB 20 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 19 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 38 3:13 PM 71 1997 47 -9 53  
MINIMUM 29 8:38 AM 6 2015 27 2 28  
AVERAGE 34 37 -3 41  
 
PRECIPITATION (IN)  
YESTERDAY T 1.34 1972 0.09 -0.09 0.02  
MONTH TO DATE 2.67 1.87 0.80 2.15  
SINCE DEC 1 10.36 7.51 2.85 8.45  
SINCE JAN 1 4.55 4.55 0.00 5.48  
 
SNOWFALL (IN)  
YESTERDAY 0.0 13.8 1979 0.3 -0.3 0.0  
MONTH TO DATE 6.2 5.7 0.5 T  
SINCE DEC 1 11.8 16.5 -4.7 2.9  
SINCE JUL 1 11.8 17.0 -5.2 2.9  
SNOW DEPTH 1  
 
DEGREE DAYS  
HEATING  
YESTERDAY 31 28 3 24  
MONTH TO DATE 590 565 25 411  
SINCE DEC 1 2296 2433 -137 2015  
SINCE JUL 1 2963 3349 -386 2878  
 
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 20 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 10.0  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LT FREEZING RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 12:00 AM  
LOWEST 58 9:00 PM  
AVERAGE 75  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 48 77 2018  
MINIMUM TEMPERATURE (F) 27 -2 1979  
 
SUNRISE AND SUNSET  
FEBRUARY 20 2021......SUNRISE 6:54 AM EST SUNSET 5:53 PM EST  
FEBRUARY 21 2021......SUNRISE 6:53 AM EST SUNSET 5:54 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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