653  
CDUS41 KLWX 100525  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1225 AM EST WED MAR 10 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 9 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 70 4:34 PM 82 2016 53 17 75  
MINIMUM 38 6:39 AM 14 1996 31 7 41  
AVERAGE 54 42 12 58  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.83 1999 0.11 -0.11 0.00  
MONTH TO DATE 0.18 0.86 -0.68 0.13  
SINCE MAR 1 0.18 0.86 -0.68 0.13  
SINCE JAN 1 6.34 6.28 0.06 6.70  
 
SNOWFALL (IN)  
YESTERDAY 0.0 8.9 1999 0.1 -0.1 0.0  
MONTH TO DATE 0.0 1.2 -1.2 0.0  
SINCE MAR 1 0.0 1.2 -1.2 0.0  
SINCE JUL 1 12.0 20.1 -8.1 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 11 23 -12 7  
MONTH TO DATE 223 220 3 163  
SINCE MAR 1 223 220 3 163  
SINCE JUL 1 3416 3810 -394 3307  
 
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 18 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 5.8  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 60 11:00 PM  
LOWEST 23 4:00 PM  
AVERAGE 42  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 53 80 2016  
MINIMUM TEMPERATURE (F) 31 7 1996  
 
SUNRISE AND SUNSET  
MARCH 10 2021.........SUNRISE 6:28 AM EST SUNSET 6:12 PM EST  
MARCH 11 2021.........SUNRISE 6:27 AM EST SUNSET 6:13 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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