215  
CDUS41 KLWX 080524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1224 AM EST MON FEB 08 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 7 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 43 2:43 AM 72 2017 45 -2 59  
MINIMUM 24 11:19 PM -1 1995 25 -1 33  
AVERAGE 34 35 -1 46  
 
PRECIPITATION (IN)  
YESTERDAY 0.35 1.53 1965 0.10 0.25 0.36  
MONTH TO DATE 0.60 0.69 -0.09 1.18  
SINCE DEC 1 8.29 6.33 1.96 7.48  
SINCE JAN 1 2.48 3.37 -0.89 4.51  
 
SNOWFALL (IN)  
YESTERDAY 1.8 10.5 1967 0.3 1.5 0.0  
MONTH TO DATE 4.5 2.2 2.3 0.0  
SINCE DEC 1 10.1 13.0 -2.9 2.9  
SINCE JUL 1 10.1 13.5 -3.4 2.9  
SNOW DEPTH T  
 
DEGREE DAYS  
HEATING  
YESTERDAY 31 30 1 19  
MONTH TO DATE 201 215 -14 123  
SINCE DEC 1 1907 2083 -176 1727  
SINCE JUL 1 2574 2999 -425 2590  
 
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 NW (310)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 7.7  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
HEAVY SNOW  
SNOW  
LIGHT SNOW  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 7:00 AM  
LOWEST 43 10:00 PM  
AVERAGE 70  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 45 71 2017  
MINIMUM TEMPERATURE (F) 25 -6 1967  
 
SUNRISE AND SUNSET  
FEBRUARY 8 2021......SUNRISE 7:09 AM EST SUNSET 5:40 PM EST  
FEBRUARY 9 2021......SUNRISE 7:08 AM EST SUNSET 5:41 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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