809  
CDUS41 KLWX 102126  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
526 PM EDT TUE SEP 10 2024  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 10 2024
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2024  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 85 2:25 PM 99 1983 82 3 84  
MINIMUM 49 5:47 AM 43 1981 60 -11 67  
AVERAGE 67 71 -4 76  
 
PRECIPITATION (IN)  
TODAY 0.00 1.50 1968 0.12 -0.12 T  
MONTH TO DATE T 1.22 -1.22 1.24  
SINCE SEP 1 T 1.22 -1.22 1.24  
SINCE JAN 1 25.78 30.44 -4.66 20.46  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 T  
SINCE SEP 1 0.0 0.0 0.0 T  
SINCE JUL 1 0.0 0.0 0.0 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 1 -1 0  
MONTH TO DATE 11 1 10 0  
SINCE SEP 1 11 1 10 0  
SINCE JUL 1 13 2 11 0  
 
COOLING  
TODAY 2 6 -4 11  
MONTH TO DATE 23 74 -51 151  
SINCE SEP 1 23 74 -51 151  
SINCE JAN 1 1437 1130 307 1266    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION N (360)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 3.2  
 
SKY COVER  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 5:00 AM  
LOWEST 36 10:00 AM  
AVERAGE 65  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 81 99 1983  
MINIMUM TEMPERATURE (F) 60 40 1976  
 
SUNRISE AND SUNSET  
SEPTEMBER 10 2024.....SUNRISE 6:47 AM EDT SUNSET 7:25 PM EDT  
SEPTEMBER 11 2024.....SUNRISE 6:48 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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