717  
CDUS41 KLWX 170524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1224 AM EST WED FEB 17 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 16 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 3:58 PM 70 1976 47 -4 53  
MINIMUM 26 11:46 PM 6 2015 26 0 29  
AVERAGE 35 36 -1 41  
 
PRECIPITATION (IN)  
YESTERDAY 0.11 2.33 2003 0.10 0.01 0.00  
MONTH TO DATE 2.01 1.58 0.43 2.13  
SINCE DEC 1 9.70 7.22 2.48 8.43  
SINCE JAN 1 3.89 4.26 -0.37 5.46  
 
SNOWFALL (IN)  
YESTERDAY 0.0 15.9 2003 0.3 -0.3 0.0  
MONTH TO DATE 5.2 4.8 0.4 T  
SINCE DEC 1 10.8 15.6 -4.8 2.9  
SINCE JUL 1 10.8 16.1 -5.3 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 30 29 1 24  
MONTH TO DATE 487 480 7 350  
SINCE DEC 1 2193 2348 -155 1954  
SINCE JUL 1 2860 3264 -404 2817  
 
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 NW (320)  
HIGHEST GUST SPEED 40 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 9.2  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 6:00 AM  
LOWEST 51 8:00 PM  
AVERAGE 76  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 47 75 1976  
MINIMUM TEMPERATURE (F) 26 -4 1979  
 
SUNRISE AND SUNSET  
FEBRUARY 17 2021......SUNRISE 6:58 AM EST SUNSET 5:50 PM EST  
FEBRUARY 18 2021......SUNRISE 6:57 AM EST SUNSET 5:51 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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