982  
CDUS41 KLWX 110525  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
125 AM EDT FRI JUN 11 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 10 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 90 1:38 PM 99 1964 82 8 90  
MINIMUM 69 11:59 PM 43 1988 60 9 74  
AVERAGE 80 71 9 82  
 
PRECIPITATION (IN)  
YESTERDAY 1.09 1.16 2009 0.15 0.94 1.07  
MONTH TO DATE 1.12 1.48 -0.36 2.94  
SINCE JUN 1 1.12 1.48 -0.36 2.94  
SINCE JAN 1 14.70 18.72 -4.02 19.46  
 
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 0 0 0  
MONTH TO DATE 0 11 -11 5  
SINCE JUN 1 0 11 -11 5  
SINCE JUL 1 4152 4603 -451 4154  
 
COOLING  
YESTERDAY 15 6 9 17  
MONTH TO DATE 120 56 64 91  
SINCE JUN 1 120 56 64 91  
SINCE JAN 1 229 162 67 168    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION E (80)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION E (90)  
AVERAGE WIND SPEED 5.1  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 11:00 PM  
LOWEST 53 1:00 PM  
AVERAGE 75  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 82 95 2016  
MINIMUM TEMPERATURE (F) 61 40 1972  
 
SUNRISE AND SUNSET  
JUNE 11 2021..........SUNRISE 5:44 AM EDT SUNSET 8:35 PM EDT  
JUNE 12 2021..........SUNRISE 5:44 AM EDT SUNSET 8:36 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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