295  
CDUS41 KLWX 230534  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1234 AM EST TUE FEB 23 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 22 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 5:07 PM 71 1991 48 -10 55  
MINIMUM 30 11:53 PM 4 1968 27 3 18  
AVERAGE 34 38 -4 37  
 
PRECIPITATION (IN)  
YESTERDAY 0.33 1.69 2003 0.09 0.24 0.00  
MONTH TO DATE 3.00 2.16 0.84 2.15  
SINCE DEC 1 10.69 7.80 2.89 8.45  
SINCE JAN 1 4.88 4.84 0.04 5.48  
 
SNOWFALL (IN)  
YESTERDAY 0.2 3.5 1986 0.3 -0.1 0.0  
MONTH TO DATE 6.4 6.4 -0.0 T  
SINCE DEC 1 12.0 17.2 -5.2 2.9  
SINCE JUL 1 12.0 17.7 -5.7 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 31 27 4 28  
MONTH TO DATE 695 648 47 506  
SINCE DEC 1 2401 2516 -115 2110  
SINCE JUL 1 3068 3432 -364 2973  
 
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 16 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 6.9  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
LT FREEZING RAIN  
LIGHT SNOW  
SLEET  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 7:00 PM  
LOWEST 56 12:00 AM  
AVERAGE 76  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 48 77 2017  
MINIMUM TEMPERATURE (F) 27 5 1963  
 
SUNRISE AND SUNSET  
FEBRUARY 23 2021......SUNRISE 6:50 AM EST SUNSET 5:56 PM EST  
FEBRUARY 24 2021......SUNRISE 6:49 AM EST SUNSET 5:57 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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