120  
CDUS41 KLWX 190530  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1230 AM EST FRI FEB 19 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 18 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 30 12:59 PM 75 2011 47 -17 60  
MINIMUM 26 9:40 AM -14 1979 26 0 39  
AVERAGE 28 37 -9 50  
 
PRECIPITATION (IN)  
YESTERDAY 0.66 1.29 1964 0.10 0.56 T  
MONTH TO DATE 2.67 1.78 0.89 2.13  
SINCE DEC 1 10.36 7.42 2.94 8.43  
SINCE JAN 1 4.55 4.46 0.09 5.46  
 
SNOWFALL (IN)  
YESTERDAY 1.0 2.5 1964 0.3 0.7 0.0  
1979  
MONTH TO DATE 6.2 5.4 0.8 T  
SINCE DEC 1 11.8 16.2 -4.4 2.9  
SINCE JUL 1 11.8 16.7 -4.9 2.9  
SNOW DEPTH 1  
 
DEGREE DAYS  
HEATING  
YESTERDAY 37 28 9 15  
MONTH TO DATE 559 537 22 387  
SINCE DEC 1 2265 2405 -140 1991  
SINCE JUL 1 2932 3321 -389 2854  
 
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 16 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 7.3  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FREEZING RAIN  
LT FREEZING RAIN  
SNOW  
LIGHT SNOW  
SLEET  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 10:00 PM  
LOWEST 49 4:00 AM  
AVERAGE 71  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 47 71 1997  
MINIMUM TEMPERATURE (F) 27 6 2015  
 
SUNRISE AND SUNSET  
FEBRUARY 19 2021......SUNRISE 6:56 AM EST SUNSET 5:52 PM EST  
FEBRUARY 20 2021......SUNRISE 6:54 AM EST SUNSET 5:53 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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