155  
CDUS41 KLWX 110524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1224 AM EST THU MAR 11 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 10 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 72 3:45 PM 80 2016 53 19 73  
MINIMUM 35 5:26 AM 7 1996 31 4 54  
AVERAGE 54 42 12 64  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.41 2011 0.09 -0.09 0.02  
MONTH TO DATE 0.18 0.95 -0.77 0.15  
SINCE MAR 1 0.18 0.95 -0.77 0.15  
SINCE JAN 1 6.34 6.37 -0.03 6.72  
 
SNOWFALL (IN)  
YESTERDAY 0.0 1.4 1993 0.1 -0.1 0.0  
MONTH TO DATE 0.0 1.3 -1.3 0.0  
SINCE MAR 1 0.0 1.3 -1.3 0.0  
SINCE JUL 1 12.0 20.2 -8.2 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 11 23 -12 1  
MONTH TO DATE 234 243 -9 164  
SINCE MAR 1 234 243 -9 164  
SINCE JUL 1 3427 3833 -406 3308  
 
COOLING  
YESTERDAY 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 14 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 5.2  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 79 4:00 AM  
LOWEST 21 3:00 PM  
AVERAGE 50  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 54 77 1990  
MINIMUM TEMPERATURE (F) 31 13 1996  
 
SUNRISE AND SUNSET  
MARCH 11 2021.........SUNRISE 6:27 AM EST SUNSET 6:13 PM EST  
MARCH 12 2021.........SUNRISE 6:25 AM EST SUNSET 6:14 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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