794  
CDUS41 KLWX 070523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT THU OCT 07 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 6 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 70 6:29 PM 89 2013 72 -2 73  
MINIMUM 67 11:59 PM 28 1968 49 18 40  
AVERAGE 69 60 9 57  
 
PRECIPITATION (IN)  
YESTERDAY T 1.05 2006 0.13 -0.13 0.00  
MONTH TO DATE T 0.76 -0.76 0.15  
SINCE SEP 1 4.72 4.70 0.02 2.43  
SINCE JAN 1 29.31 33.92 -4.61 36.65  
 
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 6 -6 8  
MONTH TO DATE 5 31 -26 50  
SINCE SEP 1 22 76 -54 111  
SINCE JUL 1 22 77 -55 111  
 
COOLING  
YESTERDAY 4 1 3 0  
MONTH TO DATE 26 11 15 0  
SINCE SEP 1 197 163 34 135  
SINCE JAN 1 1449 1219 230 1387    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION NE (60)  
AVERAGE WIND SPEED 4.7  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 4:00 AM  
LOWEST 84 8:00 PM  
AVERAGE 91  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 91 2007  
MINIMUM TEMPERATURE (F) 49 31 1988  
 
SUNRISE AND SUNSET  
OCTOBER 7 2021.......SUNRISE 7:12 AM EDT SUNSET 6:43 PM EDT  
OCTOBER 8 2021.......SUNRISE 7:13 AM EDT SUNSET 6:41 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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