373  
CDUS41 KLWX 122126  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
526 PM EDT TUE OCT 12 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 12 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 71 12:57 PM 83 1995 69 2 65  
2010  
MINIMUM 64 7:35 AM 25 1964 47 17 55  
AVERAGE 68 58 10 60  
 
PRECIPITATION (IN)  
TODAY T 0.78 1990 0.11 -0.11 0.48  
MONTH TO DATE 0.03 1.47 -1.44 1.32  
SINCE SEP 1 4.75 5.41 -0.66 3.60  
SINCE JAN 1 29.34 34.63 -5.29 37.82  
 
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 8 -8 5  
MONTH TO DATE 5 74 -69 71  
SINCE SEP 1 22 119 -97 132  
SINCE JUL 1 22 120 -98 132  
 
COOLING  
TODAY 3 1 2 0  
MONTH TO DATE 44 17 27 4  
SINCE SEP 1 215 169 46 139  
SINCE JAN 1 1467 1225 242 1391    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION N (340)  
HIGHEST GUST SPEED 10 HIGHEST GUST DIRECTION NE (30)  
AVERAGE WIND SPEED 4.1  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 5:00 AM  
LOWEST 73 12:00 PM  
AVERAGE 80  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 84 1989  
MINIMUM TEMPERATURE (F) 46 30 1987  
1988  
2012  
 
SUNRISE AND SUNSET  
OCTOBER 12 2021.......SUNRISE 7:17 AM EDT SUNSET 6:35 PM EDT  
OCTOBER 13 2021.......SUNRISE 7:18 AM EDT SUNSET 6:34 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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