933  
CDUS41 KLWX 182123  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
523 PM EDT FRI JUN 18 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 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 84 3:39 PM 94 2006 84 0 81  
2007  
2018  
MINIMUM 53 2:52 AM 45 1965 63 -10 67  
AVERAGE 69 73 -4 74  
 
PRECIPITATION (IN)  
TODAY 0.00 1.14 1991 0.13 -0.13 0.03  
MONTH TO DATE 2.75 2.63 0.12 3.88  
SINCE JUN 1 2.75 2.63 0.12 3.88  
SINCE JAN 1 16.33 19.87 -3.54 20.40  
 
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 12.0 21.0 -9.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 0 0 0  
MONTH TO DATE 1 11 -10 5  
SINCE JUN 1 1 11 -10 5  
SINCE JUL 1 4153 4603 -450 4154  
 
COOLING  
TODAY 4 8 -4 9  
MONTH TO DATE 162 117 45 136  
SINCE JUN 1 162 117 45 136  
SINCE JAN 1 271 223 48 213    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (180)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 6.0  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 3:00 AM  
LOWEST 38 1:00 PM  
AVERAGE 62  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 84 98 1994  
MINIMUM TEMPERATURE (F) 63 45 1986  
 
SUNRISE AND SUNSET  
JUNE 18 2021..........SUNRISE 5:44 AM EDT SUNSET 8:38 PM EDT  
JUNE 19 2021..........SUNRISE 5:44 AM EDT SUNSET 8:38 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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