668  
CDUS41 KLWX 212120  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
520 PM EDT SUN MAR 21 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 21 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 64 3:52 PM 78 2010 57 7 66  
MINIMUM 26 6:37 AM 14 1965 34 -8 45  
AVERAGE 45 46 -1 56  
 
PRECIPITATION (IN)  
TODAY 0.00 2.69 2019 0.12 -0.12 T  
MONTH TO DATE 0.59 2.16 -1.57 0.95  
SINCE MAR 1 0.59 2.16 -1.57 0.95  
SINCE JAN 1 6.75 7.58 -0.83 7.52  
 
SNOWFALL (IN)  
TODAY 0.0 4.8 2018 0.1 -0.1 0.0  
MONTH TO DATE T 2.3 -2.3 T  
SINCE MAR 1 T 2.3 -2.3 T  
SINCE JUL 1 12.0 21.2 -9.2 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 20 19 1 9  
MONTH TO DATE 417 474 -57 302  
SINCE MAR 1 417 474 -57 302  
SINCE JUL 1 3610 4064 -454 3446  
 
COOLING  
TODAY 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 8 HIGHEST WIND DIRECTION E (80)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION SE (120)  
AVERAGE WIND SPEED 2.6  
 
SKY COVER  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 85 4:00 AM  
LOWEST 18 3:00 PM  
AVERAGE 52  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 58 83 1968  
MINIMUM TEMPERATURE (F) 35 12 1988  
 
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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