525  
CDUS41 KLWX 060527  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1227 AM EST SAT FEB 06 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 5 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 55 4:15 PM 73 1991 44 11 59  
MINIMUM 28 11:51 PM -10 1996 25 3 37  
AVERAGE 42 34 8 48  
 
PRECIPITATION (IN)  
YESTERDAY 0.02 1.47 2010 0.09 -0.07 0.06  
MONTH TO DATE 0.25 0.49 -0.24 0.16  
SINCE DEC 1 7.94 6.13 1.81 6.46  
SINCE JAN 1 2.13 3.17 -1.04 3.49  
 
SNOWFALL (IN)  
YESTERDAY 0.0 14.9 2010 0.3 -0.3 0.0  
MONTH TO DATE 2.7 1.6 1.1 0.0  
SINCE DEC 1 8.3 12.4 -4.1 2.9  
SINCE JUL 1 8.3 12.9 -4.6 2.9  
SNOW DEPTH T  
 
DEGREE DAYS  
HEATING  
YESTERDAY 23 31 -8 17  
MONTH TO DATE 144 155 -11 82  
SINCE DEC 1 1850 2023 -173 1686  
SINCE JUL 1 2517 2939 -422 2549  
 
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 22 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 10.8  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 72 5:00 AM  
LOWEST 31 4:00 PM  
AVERAGE 52  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 45 71 2008  
MINIMUM TEMPERATURE (F) 25 -9 1996  
 
SUNRISE AND SUNSET  
FEBRUARY 6 2021......SUNRISE 7:11 AM EST SUNSET 5:37 PM EST  
FEBRUARY 7 2021......SUNRISE 7:10 AM EST SUNSET 5:38 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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