426  
CDUS41 KLWX 222123  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
523 PM EDT SUN AUG 22 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 22 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 86 12:59 PM 101 1983 86 0 84  
MINIMUM 70 2:42 AM 51 1969 65 5 72  
1976  
AVERAGE 78 75 3 78  
 
PRECIPITATION (IN)  
TODAY 0.00 0.94 2009 0.11 -0.11 0.29  
MONTH TO DATE 3.60 2.49 1.11 5.50  
SINCE JUN 1 9.68 10.94 -1.26 15.56  
SINCE JAN 1 23.26 28.18 -4.92 32.08  
 
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 0.0 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 6 13 -7 5  
SINCE JUL 1 0 0 0 0  
 
COOLING  
TODAY 13 10 3 13  
MONTH TO DATE 284 249 35 282  
SINCE JUN 1 998 865 133 1056  
SINCE JAN 1 1107 971 136 1133    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION N (10)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION N (10)  
AVERAGE WIND SPEED 4.9  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 3:00 AM  
LOWEST 61 10:00 AM  
AVERAGE 77  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 86 96 1998  
MINIMUM TEMPERATURE (F) 65 47 1981  
 
SUNRISE AND SUNSET  
AUGUST 22 2021........SUNRISE 6:30 AM EDT SUNSET 7:55 PM EDT  
AUGUST 23 2021........SUNRISE 6:31 AM EDT SUNSET 7:53 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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