004  
CDUS41 KLWX 092125  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
425 PM EST TUE FEB 09 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 9 2021
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 49 3:08 PM 69 2001 45 4 49  
MINIMUM 27 12:49 AM -5 1967 25 2 24  
AVERAGE 38 35 3 37  
 
PRECIPITATION (IN)  
TODAY 0.00 1.07 1970 0.10 -0.10 0.00  
MONTH TO DATE 0.71 0.89 -0.18 1.18  
SINCE DEC 1 8.40 6.53 1.87 7.48  
SINCE JAN 1 2.59 3.57 -0.98 4.51  
 
SNOWFALL (IN)  
TODAY 0.0 2.2 2010 0.3 -0.3 0.0  
MONTH TO DATE 4.5 2.8 1.7 0.0  
SINCE DEC 1 10.1 13.6 -3.5 2.9  
SINCE JUL 1 10.1 14.1 -4.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 27 30 -3 28  
MONTH TO DATE 263 275 -12 180  
SINCE DEC 1 1969 2143 -174 1784  
SINCE JUL 1 2636 3059 -423 2647  
 
COOLING  
TODAY 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 15 HIGHEST WIND DIRECTION N (360)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 4.5  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 78 7:00 AM  
LOWEST 49 3:00 PM  
AVERAGE 64  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 45 63 1990  
2001  
MINIMUM TEMPERATURE (F) 25 -10 1979  
 
SUNRISE AND SUNSET  
FEBRUARY 9 2021......SUNRISE 7:08 AM EST SUNSET 5:41 PM EST  
FEBRUARY 10 2021......SUNRISE 7:07 AM EST SUNSET 5:42 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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