892  
CDUS41 KLWX 192128  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
528 PM EDT THU AUG 19 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR AUGUST 19 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 2:40 PM 95 2002 86 5 84  
2019  
MINIMUM 72 6:13 AM 51 1998 65 7 64  
AVERAGE 82 76 6 74  
 
PRECIPITATION (IN)  
TODAY 0.00 1.54 1967 0.11 -0.11 0.17  
MONTH TO DATE 3.26 2.17 1.09 5.21  
SINCE JUN 1 9.34 10.62 -1.28 15.27  
SINCE JAN 1 22.92 27.86 -4.94 31.79  
 
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 17 11 6 9  
MONTH TO DATE 244 219 25 251  
SINCE JUN 1 958 835 123 1025  
SINCE JAN 1 1067 941 126 1102    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 5.6  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 91 1:00 AM  
LOWEST 50 2:00 PM  
AVERAGE 71  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 86 104 1983  
MINIMUM TEMPERATURE (F) 65 47 1964  
1976  
1998  
 
SUNRISE AND SUNSET  
AUGUST 19 2021........SUNRISE 6:27 AM EDT SUNSET 7:59 PM EDT  
AUGUST 20 2021........SUNRISE 6:28 AM EDT SUNSET 7:57 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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