312  
CDUS41 KLWX 182126  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
526 PM EDT SUN JUL 18 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 18 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 82 12:58 PM 101 2012 88 -6 97  
MINIMUM 70 5:44 AM 51 1985 67 3 71  
AVERAGE 76 78 -2 84  
 
PRECIPITATION (IN)  
TODAY 0.00 1.66 2017 0.15 -0.15 0.00  
MONTH TO DATE 2.40 2.47 -0.07 1.56  
SINCE JUN 1 6.05 6.77 -0.72 6.77  
SINCE JAN 1 19.63 24.01 -4.38 23.29  
 
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 6 13 -7 5  
SINCE JUL 1 0 0 0 0  
 
COOLING  
TODAY 11 12 -1 19  
MONTH TO DATE 251 214 37 275  
SINCE JUN 1 545 452 93 548  
SINCE JAN 1 654 558 96 625    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 34 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 11.1  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 91 1:00 AM  
LOWEST 52 11:00 AM  
AVERAGE 72  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 98 1977  
2020  
MINIMUM TEMPERATURE (F) 67 53 1976  
 
SUNRISE AND SUNSET  
JULY 18 2021..........SUNRISE 5:59 AM EDT SUNSET 8:33 PM EDT  
JULY 19 2021..........SUNRISE 6:00 AM EDT SUNSET 8:32 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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