410  
CDUS41 KLWX 190520  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
120 AM EDT FRI JUL 19 2024  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 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 85 4:45 PM 101 2012 88 -3 89  
MINIMUM 72 11:53 PM 51 1985 67 5 66  
AVERAGE 79 78 1 78  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.66 2017 0.15 -0.15 0.00  
MONTH TO DATE 2.10 2.47 -0.37 3.44  
SINCE JUN 1 2.79 6.77 -3.98 5.74  
SINCE JAN 1 20.09 24.01 -3.92 15.72  
 
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 14 12 2 13  
MONTH TO DATE 316 214 102 282  
SINCE JUN 1 670 452 218 464  
SINCE JAN 1 853 558 295 538    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (20)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION N (20)  
AVERAGE WIND SPEED 5.5  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 91 12:00 AM  
LOWEST 51 3:00 PM  
AVERAGE 71  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 98 1977  
2020  
MINIMUM TEMPERATURE (F) 67 53 1976  
 
SUNRISE AND SUNSET  
JULY 19 2024..........SUNRISE 6:00 AM EDT SUNSET 8:32 PM EDT  
JULY 20 2024..........SUNRISE 6:01 AM EDT SUNSET 8:31 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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