520  
CDUS41 KLWX 240527  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1227 AM EST WED FEB 24 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 23 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 57 2:46 PM 77 2017 48 9 58  
MINIMUM 27 5:36 AM 5 1963 27 0 19  
AVERAGE 42 38 4 39  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.34 1987 0.10 -0.10 0.00  
MONTH TO DATE 3.00 2.26 0.74 2.15  
SINCE DEC 1 10.69 7.90 2.79 8.45  
SINCE JAN 1 4.88 4.94 -0.06 5.48  
 
SNOWFALL (IN)  
YESTERDAY 0.0 8.9 1987 0.2 -0.2 0.0  
MONTH TO DATE 6.2 6.6 -0.4 T  
SINCE DEC 1 11.8 17.4 -5.6 2.9  
SINCE JUL 1 11.8 17.9 -6.1 2.9  
SNOW DEPTH T  
 
DEGREE DAYS  
HEATING  
YESTERDAY 23 27 -4 26  
MONTH TO DATE 718 675 43 532  
SINCE DEC 1 2424 2543 -119 2136  
SINCE JUL 1 3091 3459 -368 2999  
 
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 29 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 40 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 9.0  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 1:00 AM  
LOWEST 43 5:00 PM  
AVERAGE 70  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 49 79 1985  
MINIMUM TEMPERATURE (F) 28 -4 2015  
 
SUNRISE AND SUNSET  
FEBRUARY 24 2021......SUNRISE 6:49 AM EST SUNSET 5:57 PM EST  
FEBRUARY 25 2021......SUNRISE 6:48 AM EST SUNSET 5:59 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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