946  
CDUS41 KLWX 220530  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
130 AM EDT TUE JUN 22 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 21 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 92 3:19 PM 98 1988 85 7 87  
MINIMUM 69 11:40 PM 49 1992 64 5 67  
AVERAGE 81 74 7 77  
 
PRECIPITATION (IN)  
YESTERDAY 0.11 10.67 1972 0.14 -0.03 0.00  
MONTH TO DATE 2.92 3.03 -0.11 4.19  
SINCE JUN 1 2.92 3.03 -0.11 4.19  
SINCE JAN 1 16.50 20.27 -3.77 20.71  
 
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 1 11 -10 5  
SINCE JUN 1 1 11 -10 5  
SINCE JUL 1 4153 4603 -450 4154  
 
COOLING  
YESTERDAY 16 9 7 12  
MONTH TO DATE 205 144 61 164  
SINCE JUN 1 205 144 61 164  
SINCE JAN 1 314 250 64 241    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 31 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 42 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 5.9  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 94 4:00 AM  
LOWEST 49 3:00 PM  
AVERAGE 72  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 85 99 1988  
MINIMUM TEMPERATURE (F) 64 48 1963  
1992  
 
SUNRISE AND SUNSET  
JUNE 22 2021..........SUNRISE 5:45 AM EDT SUNSET 8:39 PM EDT  
JUNE 23 2021..........SUNRISE 5:45 AM EDT SUNSET 8:39 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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