985  
CDUS41 KLWX 202125  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
525 PM EDT TUE AUG 20 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 20 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 74 3:48 PM 104 1983 86 -12 91  
MINIMUM 61 5:55 AM 47 1964 65 -4 56  
1976  
1998  
AVERAGE 68 76 -8 74  
 
PRECIPITATION (IN)  
TODAY 0.00 2.17 1963 0.11 -0.11 0.00  
MONTH TO DATE 3.05 2.28 0.77 1.84  
SINCE JUN 1 6.40 10.73 -4.33 9.23  
SINCE JAN 1 23.70 27.97 -4.27 19.21  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE JUN 1 0.0 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 0 13 -13 5  
SINCE JUL 1 0 0 0 0  
 
COOLING  
TODAY 3 10 -7 9  
MONTH TO DATE 275 229 46 238  
SINCE JUN 1 1128 845 283 893  
SINCE JAN 1 1311 951 360 967    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 12.9  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 81 6:00 AM  
LOWEST 41 2:00 PM  
AVERAGE 61  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 86 96 1962  
MINIMUM TEMPERATURE (F) 65 47 1976  
 
SUNRISE AND SUNSET  
AUGUST 20 2024........SUNRISE 6:28 AM EDT SUNSET 7:57 PM EDT  
AUGUST 21 2024........SUNRISE 6:29 AM EDT SUNSET 7:56 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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