223  
CDUS41 KLWX 080522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT FRI OCT 08 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 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 75 2:45 PM 91 2007 71 4 83  
MINIMUM 64 11:52 PM 31 1988 49 15 49  
AVERAGE 70 60 10 66  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 3.50 2005 0.12 -0.12 0.00  
MONTH TO DATE T 0.88 -0.88 0.15  
SINCE SEP 1 4.72 4.82 -0.10 2.43  
SINCE JAN 1 29.31 34.04 -4.73 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 0  
MONTH TO DATE 5 37 -32 50  
SINCE SEP 1 22 82 -60 111  
SINCE JUL 1 22 83 -61 111  
 
COOLING  
YESTERDAY 5 1 4 1  
MONTH TO DATE 31 12 19 1  
SINCE SEP 1 202 164 38 136  
SINCE JAN 1 1454 1220 234 1388    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 11 HIGHEST GUST DIRECTION SE (120)  
AVERAGE WIND SPEED 2.3  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 12:00 AM  
LOWEST 64 3:00 PM  
AVERAGE 77  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 92 2007  
MINIMUM TEMPERATURE (F) 48 30 2001  
 
SUNRISE AND SUNSET  
OCTOBER 8 2021.......SUNRISE 7:13 AM EDT SUNSET 6:41 PM EDT  
OCTOBER 9 2021.......SUNRISE 7:14 AM EDT SUNSET 6:40 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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