546  
CDUS41 KLWX 202122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
522 PM EDT SUN JUN 20 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JUNE 20 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 91 3:11 PM 97 1964 85 6 80  
MINIMUM 66 5:06 AM 48 2000 63 3 64  
AVERAGE 79 74 5 72  
 
PRECIPITATION (IN)  
TODAY T 1.49 1962 0.13 -0.13 T  
MONTH TO DATE 2.81 2.89 -0.08 4.19  
SINCE JUN 1 2.81 2.89 -0.08 4.19  
SINCE JAN 1 16.39 20.13 -3.74 20.71  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 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  
TODAY 14 9 5 7  
MONTH TO DATE 189 135 54 152  
SINCE JUN 1 189 135 54 152  
SINCE JAN 1 298 241 57 229    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION S (180)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 5.2  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
THUNDERSTORM  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 5:00 AM  
LOWEST 48 1:00 PM  
AVERAGE 73  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 85 98 1988  
MINIMUM TEMPERATURE (F) 64 49 1992  
 
SUNRISE AND SUNSET  
JUNE 20 2021..........SUNRISE 5:44 AM EDT SUNSET 8:39 PM EDT  
JUNE 21 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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