372  
CDUS41 KLWX 050523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT SAT JUN 05 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 4 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 86 4:22 PM 91 2020 80 6 91  
MINIMUM 65 11:33 PM 40 1976 59 6 66  
1977  
AVERAGE 76 69 7 79  
 
PRECIPITATION (IN)  
YESTERDAY T 1.63 2008 0.15 -0.15 1.30  
MONTH TO DATE 0.03 0.59 -0.56 1.30  
SINCE JUN 1 0.03 0.59 -0.56 1.30  
SINCE JAN 1 13.61 17.83 -4.22 17.82  
 
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 6 -6 5  
SINCE JUN 1 0 6 -6 5  
SINCE JUL 1 4152 4598 -446 4154  
 
COOLING  
YESTERDAY 11 5 6 14  
MONTH TO DATE 29 20 9 30  
SINCE JUN 1 29 20 9 30  
SINCE JAN 1 138 126 12 107    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 7.0  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 4:00 AM  
LOWEST 37 6:00 PM  
AVERAGE 67  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 80 90 2002  
MINIMUM TEMPERATURE (F) 59 40 1976  
 
SUNRISE AND SUNSET  
JUNE 5 2021..........SUNRISE 5:45 AM EDT SUNSET 8:32 PM EDT  
JUNE 6 2021..........SUNRISE 5:45 AM EDT SUNSET 8:33 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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