540  
CDUS41 KLWX 230521  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
121 AM EDT TUE MAR 23 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 22 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 66 3:40 PM 83 1968 58 8 52  
MINIMUM 27 6:22 AM 12 1988 35 -8 36  
AVERAGE 47 46 1 44  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.93 1977 0.12 -0.12 0.00  
MONTH TO DATE 0.59 2.28 -1.69 0.95  
SINCE MAR 1 0.59 2.28 -1.69 0.95  
SINCE JAN 1 6.75 7.70 -0.95 7.52  
 
SNOWFALL (IN)  
YESTERDAY 0.0 1.2 1992 0.1 -0.1 0.0  
MONTH TO DATE T 2.4 -2.4 T  
SINCE MAR 1 T 2.4 -2.4 T  
SINCE JUL 1 12.0 21.3 -9.3 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 18 19 -1 21  
MONTH TO DATE 435 493 -58 323  
SINCE MAR 1 435 493 -58 323  
SINCE JUL 1 3628 4083 -455 3467  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 3  
SINCE MAR 1 0 0 0 3  
SINCE JAN 1 0 0 0 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION E (90)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION SE (120)  
AVERAGE WIND SPEED 2.8  
 
SKY COVER  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 85 7:00 AM  
LOWEST 22 4:00 PM  
AVERAGE 54  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 58 83 1994  
2012  
MINIMUM TEMPERATURE (F) 35 17 1969  
 
SUNRISE AND SUNSET  
MARCH 23 2021.........SUNRISE 7:08 AM EDT SUNSET 7:25 PM EDT  
MARCH 24 2021.........SUNRISE 7:07 AM EDT SUNSET 7:26 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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