017  
CDUS41 KLWX 082122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
422 PM EST FRI JAN 08 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 8 2021
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
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 39 2:02 PM 70 2008 42 -3 43  
MINIMUM 29 1:08 AM -4 1970 24 5 25  
AVERAGE 34 33 1 34  
 
PRECIPITATION (IN)  
TODAY 0.00 1.07 1978 0.08 -0.08 0.00  
MONTH TO DATE 1.14 0.65 0.49 1.00  
SINCE DEC 1 6.95 3.61 3.34 3.97  
SINCE JAN 1 1.14 0.65 0.49 1.00  
 
SNOWFALL (IN)  
TODAY 0.0 4.7 1990 0.2 -0.2 0.0  
MONTH TO DATE 0.0 1.4 -1.4 2.0  
SINCE DEC 1 2.4 4.9 -2.5 2.6  
SINCE JUL 1 2.4 5.4 -3.0 2.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 31 32 -1 31  
MONTH TO DATE 214 256 -42 203  
SINCE DEC 1 1016 1138 -122 1003  
SINCE JUL 1 1683 2054 -371 1866  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION N (10)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION N (20)  
AVERAGE WIND SPEED 6.0  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 78 6:00 AM  
LOWEST 54 2:00 PM  
AVERAGE 66  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 64 2008  
MINIMUM TEMPERATURE (F) 24 -8 1970  
 
SUNRISE AND SUNSET  
JANUARY 8 2021.......SUNRISE 7:29 AM EST SUNSET 5:05 PM EST  
JANUARY 9 2021.......SUNRISE 7:28 AM EST SUNSET 5:06 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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