544  
CDUS41 KLWX 120522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT SAT JUN 12 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 11 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 69 2:13 PM 95 2016 82 -13 85  
MINIMUM 66 11:59 PM 40 1972 61 5 70  
AVERAGE 68 71 -3 78  
 
PRECIPITATION (IN)  
YESTERDAY 0.56 1.07 2004 0.14 0.42 0.43  
MONTH TO DATE 1.68 1.62 0.06 3.37  
SINCE JUN 1 1.68 1.62 0.06 3.37  
SINCE JAN 1 15.26 18.86 -3.60 19.89  
 
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 3 7 -4 13  
MONTH TO DATE 123 63 60 104  
SINCE JUN 1 123 63 60 104  
SINCE JAN 1 232 169 63 181    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NE (60)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION NE (60)  
AVERAGE WIND SPEED 9.0  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 3:00 AM  
LOWEST 90 5:00 PM  
AVERAGE 94  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 82 96 1986  
MINIMUM TEMPERATURE (F) 61 44 1972  
1980  
 
SUNRISE AND SUNSET  
JUNE 12 2021..........SUNRISE 5:44 AM EDT SUNSET 8:36 PM EDT  
JUNE 13 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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