694  
CDUS41 KLWX 210528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1228 AM EST SUN FEB 21 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 20 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 32 3:12 PM 77 2018 48 -16 38  
MINIMUM 24 11:59 PM -2 1979 27 -3 28  
AVERAGE 28 37 -9 33  
 
PRECIPITATION (IN)  
YESTERDAY T 1.02 1996 0.10 -0.10 0.00  
MONTH TO DATE 2.67 1.97 0.70 2.15  
SINCE DEC 1 10.36 7.61 2.75 8.45  
SINCE JAN 1 4.55 4.65 -0.10 5.48  
 
SNOWFALL (IN)  
YESTERDAY T 4.7 2019 0.2 -0.2 0.0  
MONTH TO DATE 6.2 5.9 0.3 T  
SINCE DEC 1 11.8 16.7 -4.9 2.9  
SINCE JUL 1 11.8 17.2 -5.4 2.9  
SNOW DEPTH 1  
 
DEGREE DAYS  
HEATING  
YESTERDAY 37 28 9 32  
MONTH TO DATE 627 593 34 443  
SINCE DEC 1 2333 2461 -128 2047  
SINCE JUL 1 3000 3377 -377 2910  
 
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 32 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 45 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 15.9  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 65 4:00 AM  
LOWEST 41 1:00 PM  
AVERAGE 53  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 48 80 2018  
MINIMUM TEMPERATURE (F) 27 7 1968  
1972  
 
SUNRISE AND SUNSET  
FEBRUARY 21 2021......SUNRISE 6:53 AM EST SUNSET 5:54 PM EST  
FEBRUARY 22 2021......SUNRISE 6:52 AM EST SUNSET 5:55 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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