275  
CDUS41 KLWX 202130  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
430 PM EST WED JAN 20 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 20 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 43 1:48 PM 63 2006 42 1 34  
MINIMUM 27 12:12 AM -7 1985 24 3 22  
AVERAGE 35 33 2 28  
 
PRECIPITATION (IN)  
TODAY 0.01 1.01 1979 0.09 -0.08 0.00  
MONTH TO DATE 1.26 1.68 -0.42 1.79  
SINCE DEC 1 7.07 4.64 2.43 4.76  
SINCE JAN 1 1.26 1.68 -0.42 1.79  
 
SNOWFALL (IN)  
TODAY T 4.6 2000 0.3 -0.3 0.0  
MONTH TO DATE T 4.3 -4.3 2.3  
SINCE DEC 1 2.4 7.8 -5.4 2.9  
SINCE JUL 1 2.4 8.3 -5.9 2.9  
SNOW DEPTH T  
 
DEGREE DAYS  
HEATING  
TODAY 30 32 -2 37  
MONTH TO DATE 548 640 -92 485  
SINCE DEC 1 1350 1522 -172 1285  
SINCE JUL 1 2017 2438 -421 2148  
 
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 30 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 41 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 13.2  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
LIGHT SNOW  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 85 5:00 AM  
LOWEST 38 4:00 PM  
AVERAGE 62  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 63 2018  
MINIMUM TEMPERATURE (F) 24 -16 1984  
 
SUNRISE AND SUNSET  
JANUARY 20 2021.......SUNRISE 7:25 AM EST SUNSET 5:18 PM EST  
JANUARY 21 2021.......SUNRISE 7:24 AM EST SUNSET 5:19 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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