644  
CDUS41 KLWX 150525  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1225 AM EST MON FEB 15 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 14 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 37 7:34 PM 71 1990 46 -9 40  
MINIMUM 27 6:22 AM -5 1979 26 1 23  
AVERAGE 32 36 -4 32  
 
PRECIPITATION (IN)  
YESTERDAY T 1.27 1984 0.10 -0.10 T  
MONTH TO DATE 1.33 1.38 -0.05 2.13  
SINCE DEC 1 9.02 7.02 2.00 8.43  
SINCE JAN 1 3.21 4.06 -0.85 5.46  
 
SNOWFALL (IN)  
YESTERDAY 0.0 3.4 1970 0.2 -0.2 T  
MONTH TO DATE 5.2 4.2 1.0 T  
SINCE DEC 1 10.8 15.0 -4.2 2.9  
SINCE JUL 1 10.8 15.5 -4.7 2.9  
SNOW DEPTH T  
 
DEGREE DAYS  
HEATING  
YESTERDAY 33 29 4 33  
MONTH TO DATE 428 422 6 287  
SINCE DEC 1 2134 2290 -156 1891  
SINCE JUL 1 2801 3206 -405 2754  
 
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 13 HIGHEST WIND DIRECTION N (360)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 7.7  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 2:00 AM  
LOWEST 67 5:00 PM  
AVERAGE 82  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 46 76 2018  
MINIMUM TEMPERATURE (F) 26 6 2015  
 
SUNRISE AND SUNSET  
FEBRUARY 15 2021......SUNRISE 7:01 AM EST SUNSET 5:48 PM EST  
FEBRUARY 16 2021......SUNRISE 6:59 AM EST SUNSET 5:49 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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