409  
CDUS41 KLWX 030526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EDT SUN OCT 03 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 2 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 80 3:32 PM 96 2019 73 7 68  
MINIMUM 47 6:25 AM 32 1997 51 -4 44  
1998  
AVERAGE 64 62 2 56  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.35 2012 0.13 -0.13 0.04  
MONTH TO DATE 0.00 0.26 -0.26 0.09  
SINCE SEP 1 4.72 4.20 0.52 2.37  
SINCE JAN 1 29.31 33.42 -4.11 36.59  
 
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 1 5 -4 9  
MONTH TO DATE 5 9 -4 12  
SINCE SEP 1 22 54 -32 73  
SINCE JUL 1 22 55 -33 73  
 
COOLING  
YESTERDAY 0 2 -2 0  
MONTH TO DATE 0 4 -4 0  
SINCE SEP 1 171 156 15 135  
SINCE JAN 1 1423 1212 211 1387    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION SW (220)  
AVERAGE WIND SPEED 1.7  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 3:00 AM  
LOWEST 45 4:00 PM  
AVERAGE 71  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 86 2002  
2007  
2018  
MINIMUM TEMPERATURE (F) 51 30 1974  
2003  
 
SUNRISE AND SUNSET  
OCTOBER 3 2021.......SUNRISE 7:08 AM EDT SUNSET 6:49 PM EDT  
OCTOBER 4 2021.......SUNRISE 7:09 AM EDT SUNSET 6:47 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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