619  
CDUS41 KLWX 022121  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
521 PM EDT THU SEP 02 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 2 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 80 3:23 PM 99 1980 84 -4 87  
MINIMUM 61 6:28 AM 44 1970 63 -2 72  
AVERAGE 71 73 -2 80  
 
PRECIPITATION (IN)  
TODAY 0.00 0.97 1969 0.12 -0.12 T  
MONTH TO DATE 1.93 0.24 1.69 0.18  
SINCE SEP 1 1.93 0.24 1.69 0.18  
SINCE JAN 1 26.52 29.46 -2.94 34.40  
 
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 SEP 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 SEP 1 0 0 0 0  
SINCE JUL 1 0 1 -1 0  
 
COOLING  
TODAY 6 8 -2 15  
MONTH TO DATE 14 16 -2 23  
SINCE SEP 1 14 16 -2 23  
SINCE JAN 1 1266 1072 194 1275    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (360)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION N (340)  
AVERAGE WIND SPEED 12.9  
 
SKY COVER  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 79 12:00 AM  
LOWEST 32 4:00 PM  
AVERAGE 56  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 84 96 1993  
MINIMUM TEMPERATURE (F) 62 45 1967  
 
SUNRISE AND SUNSET  
SEPTEMBER 2 2021.....SUNRISE 6:40 AM EDT SUNSET 7:38 PM EDT  
SEPTEMBER 3 2021.....SUNRISE 6:41 AM EDT SUNSET 7:37 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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