599  
CDUS41 KLWX 160530  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
130 AM EDT WED JUN 16 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 15 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 80 2:33 PM 99 1994 83 -3 76  
MINIMUM 63 4:15 AM 42 1978 62 1 58  
AVERAGE 72 72 0 67  
 
PRECIPITATION (IN)  
YESTERDAY T 1.70 1960 0.15 -0.15 0.00  
MONTH TO DATE 2.75 2.21 0.54 3.37  
SINCE JUN 1 2.75 2.21 0.54 3.37  
SINCE JAN 1 16.33 19.45 -3.12 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 7 8 -1 2  
MONTH TO DATE 153 93 60 120  
SINCE JUN 1 153 93 60 120  
SINCE JAN 1 262 199 63 197    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 8.4  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 4:00 AM  
LOWEST 45 6:00 PM  
AVERAGE 69  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 83 96 1991  
1994  
MINIMUM TEMPERATURE (F) 62 47 1978  
 
SUNRISE AND SUNSET  
JUNE 16 2021..........SUNRISE 5:44 AM EDT SUNSET 8:37 PM EDT  
JUNE 17 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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