006  
CDUS41 KLWX 080526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EDT WED SEP 08 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 7 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 86 3:10 PM 95 1983 82 4 83  
1985  
MINIMUM 58 5:35 AM 41 1976 61 -3 57  
AVERAGE 72 72 0 70  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.11 2011 0.12 -0.12 0.00  
MONTH TO DATE 1.99 0.85 1.14 0.28  
SINCE SEP 1 1.99 0.85 1.14 0.28  
SINCE JAN 1 26.58 30.07 -3.49 34.50  
 
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 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  
YESTERDAY 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  
YESTERDAY 7 7 0 5  
MONTH TO DATE 37 54 -17 62  
SINCE SEP 1 37 54 -17 62  
SINCE JAN 1 1289 1110 179 1314    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION S (180)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 4.5  
 
SKY COVER  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 6:00 AM  
LOWEST 37 3:00 PM  
AVERAGE 65  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 82 96 2016  
MINIMUM TEMPERATURE (F) 61 43 1984  
 
SUNRISE AND SUNSET  
SEPTEMBER 8 2021.....SUNRISE 6:45 AM EDT SUNSET 7:29 PM EDT  
SEPTEMBER 9 2021.....SUNRISE 6:46 AM EDT SUNSET 7:27 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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