748  
CDUS41 KLWX 310521  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
121 AM EDT WED JUL 31 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 30 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 3:16 PM 98 1988 88 1 88  
MINIMUM 74 11:59 PM 48 2014 67 7 70  
AVERAGE 82 77 5 79  
 
PRECIPITATION (IN)  
YESTERDAY 0.12 1.29 2018 0.13 -0.01 0.00  
MONTH TO DATE 2.66 4.02 -1.36 5.00  
SINCE JUN 1 3.35 8.32 -4.97 7.30  
SINCE JAN 1 20.65 25.56 -4.91 17.28  
 
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 17 12 5 14  
MONTH TO DATE 479 358 121 464  
SINCE JUN 1 833 596 237 646  
SINCE JAN 1 1016 702 314 720    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION SE (150)  
AVERAGE WIND SPEED 9.0  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 85 5:00 PM  
LOWEST 55 3:00 PM  
AVERAGE 70  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 98 1999  
MINIMUM TEMPERATURE (F) 67 50 1997  
 
SUNRISE AND SUNSET  
JULY 31 2024..........SUNRISE 6:10 AM EDT SUNSET 8:21 PM EDT  
AUGUST 1 2024........SUNRISE 6:11 AM EDT SUNSET 8:20 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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