240  
CDUS41 KLWX 210522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT SUN MAR 21 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 20 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 58 4:51 PM 80 2020 57 1 80  
MINIMUM 27 6:27 AM 18 1981 34 -7 55  
AVERAGE 43 46 -3 68  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.81 2003 0.11 -0.11 T  
MONTH TO DATE 0.59 2.04 -1.45 0.95  
SINCE MAR 1 0.59 2.04 -1.45 0.95  
SINCE JAN 1 6.75 7.46 -0.71 7.52  
 
SNOWFALL (IN)  
YESTERDAY 0.0 2.2 1990 0.1 -0.1 0.0  
MONTH TO DATE T 2.2 -2.2 T  
SINCE MAR 1 T 2.2 -2.2 T  
SINCE JUL 1 12.0 21.1 -9.1 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 22 20 2 0  
MONTH TO DATE 397 455 -58 293  
SINCE MAR 1 397 455 -58 293  
SINCE JUL 1 3590 4045 -455 3437  
 
COOLING  
YESTERDAY 0 0 0 3  
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 N (350)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 3.2  
 
SKY COVER  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 67 11:00 PM  
LOWEST 21 4:00 PM  
AVERAGE 44  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 57 78 2010  
MINIMUM TEMPERATURE (F) 34 14 1965  
 
SUNRISE AND SUNSET  
MARCH 21 2021.........SUNRISE 7:11 AM EDT SUNSET 7:23 PM EDT  
MARCH 22 2021.........SUNRISE 7:10 AM EDT SUNSET 7:24 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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