829  
CDUS41 KLWX 122122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
422 PM EST TUE JAN 12 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 12 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 49 3:34 PM 70 2017 42 7 68  
2018  
MINIMUM 20 6:40 AM -4 1977 24 -4 46  
AVERAGE 35 33 2 57  
 
PRECIPITATION (IN)  
TODAY 0.00 0.91 2018 0.09 -0.09 0.38  
MONTH TO DATE 1.14 0.99 0.15 1.39  
SINCE DEC 1 6.95 3.95 3.00 4.36  
SINCE JAN 1 1.14 0.99 0.15 1.39  
 
SNOWFALL (IN)  
TODAY 0.0 6.1 1996 0.2 -0.2 0.0  
MONTH TO DATE 0.0 2.2 -2.2 2.0  
SINCE DEC 1 2.4 5.7 -3.3 2.6  
SINCE JUL 1 2.4 6.2 -3.8 2.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 30 32 -2 8  
MONTH TO DATE 332 384 -52 270  
SINCE DEC 1 1134 1266 -132 1070  
SINCE JUL 1 1801 2182 -381 1933  
 
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 9 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 2.5  
 
SKY COVER  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 8:00 AM  
LOWEST 40 4:00 PM  
AVERAGE 66  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 69 2005  
MINIMUM TEMPERATURE (F) 24 -3 1977  
1981  
 
SUNRISE AND SUNSET  
JANUARY 12 2021.......SUNRISE 7:28 AM EST SUNSET 5:09 PM EST  
JANUARY 13 2021.......SUNRISE 7:28 AM EST SUNSET 5:10 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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