479  
CDUS41 KLWX 090524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
124 AM EDT WED JUN 09 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 8 2021
 
 
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)  
YESTERDAY  
MAXIMUM 91 5:46 PM 97 2007 81 10 82  
MINIMUM 73 11:59 PM 36 1977 60 13 57  
AVERAGE 82 70 12 70  
 
PRECIPITATION (IN)  
YESTERDAY T 1.71 2014 0.15 -0.15 0.00  
MONTH TO DATE 0.03 1.19 -1.16 1.87  
SINCE JUN 1 0.03 1.19 -1.16 1.87  
SINCE JAN 1 13.61 18.43 -4.82 18.39  
 
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 12.0 21.0 -9.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 0 10 -10 5  
SINCE JUN 1 0 10 -10 5  
SINCE JUL 1 4152 4602 -450 4154  
 
COOLING  
YESTERDAY 17 6 11 5  
MONTH TO DATE 91 44 47 64  
SINCE JUN 1 91 44 47 64  
SINCE JAN 1 200 150 50 141    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION SW (210)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 4.9  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 11:00 PM  
LOWEST 50 2:00 PM  
AVERAGE 70  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 81 97 2011  
MINIMUM TEMPERATURE (F) 60 43 1975  
 
SUNRISE AND SUNSET  
JUNE 9 2021..........SUNRISE 5:44 AM EDT SUNSET 8:34 PM EDT  
JUNE 10 2021..........SUNRISE 5:44 AM EDT SUNSET 8:35 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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