659  
CDUS41 KLWX 182134  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
534 PM EDT THU MAR 18 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 18 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 53 3:59 PM 80 1989 56 -3 56  
MINIMUM 46 3:06 AM 13 1976 33 13 38  
AVERAGE 50 45 5 47  
 
PRECIPITATION (IN)  
TODAY 0.38 1.16 1998 0.11 0.27 0.08  
MONTH TO DATE 0.56 1.81 -1.25 0.66  
SINCE MAR 1 0.56 1.81 -1.25 0.66  
SINCE JAN 1 6.72 7.23 -0.51 7.23  
 
SNOWFALL (IN)  
TODAY 0.0 1.5 1994 0.1 -0.1 0.0  
MONTH TO DATE T 2.1 -2.1 T  
SINCE MAR 1 T 2.1 -2.1 T  
SINCE JUL 1 12.0 21.0 -9.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 15 20 -5 18  
MONTH TO DATE 353 415 -62 289  
SINCE MAR 1 353 415 -62 289  
SINCE JUL 1 3546 4005 -459 3433  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 5.4  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 2:00 PM  
LOWEST 83 12:00 AM  
AVERAGE 90  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 57 76 2012  
MINIMUM TEMPERATURE (F) 34 10 1967  
 
SUNRISE AND SUNSET  
MARCH 18 2021.........SUNRISE 7:16 AM EDT SUNSET 7:20 PM EDT  
MARCH 19 2021.........SUNRISE 7:14 AM EDT SUNSET 7:21 PM EDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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