519  
CDUS41 KLWX 190527  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
127 AM EDT MON AUG 19 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 18 2024  
 
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)  
YESTERDAY  
MAXIMUM 89 4:03 PM 98 2009 86 3 86  
MINIMUM 71 11:59 PM 45 1981 65 6 68  
AVERAGE 80 76 4 77  
 
PRECIPITATION (IN)  
YESTERDAY 0.61 1.39 2010 0.11 0.50 0.00  
MONTH TO DATE 3.05 2.06 0.99 1.84  
SINCE JUN 1 6.40 10.51 -4.11 9.23  
SINCE JAN 1 23.70 27.75 -4.05 19.21  
 
SNOWFALL (IN)  
YESTERDAY 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  
YESTERDAY 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  
YESTERDAY 15 11 4 12  
MONTH TO DATE 261 208 53 224  
SINCE JUN 1 1114 824 290 879  
SINCE JAN 1 1297 930 367 953    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 2.9  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 6:00 AM  
LOWEST 53 4:00 PM  
AVERAGE 75  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 86 95 2002  
2019  
MINIMUM TEMPERATURE (F) 65 51 1998  
 
SUNRISE AND SUNSET  
AUGUST 19 2024........SUNRISE 6:27 AM EDT SUNSET 7:58 PM EDT  
AUGUST 20 2024........SUNRISE 6:28 AM EDT SUNSET 7:57 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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