423  
CDUS41 KLWX 232127  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
427 PM EST SAT JAN 23 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 23 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 38 12:13 AM 72 1967 43 -5 43  
MINIMUM 28 9:29 AM -4 1970 24 4 19  
1978  
AVERAGE 33 33 0 31  
 
PRECIPITATION (IN)  
TODAY 0.00 1.88 2016 0.09 -0.09 0.00  
MONTH TO DATE 1.26 1.95 -0.69 1.79  
SINCE DEC 1 7.07 4.91 2.16 4.76  
SINCE JAN 1 1.26 1.95 -0.69 1.79  
 
SNOWFALL (IN)  
TODAY 0.0 22.1 2016 0.2 -0.2 0.0  
MONTH TO DATE T 5.0 -5.0 2.3  
SINCE DEC 1 2.4 8.5 -6.1 2.9  
SINCE JUL 1 2.4 9.0 -6.6 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 32 32 0 34  
MONTH TO DATE 637 736 -99 593  
SINCE DEC 1 1439 1618 -179 1393  
SINCE JUL 1 2106 2534 -428 2256  
 
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 26 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 38 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 15.6  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 53 9:00 AM  
LOWEST 32 3:00 PM  
AVERAGE 43  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 73 1967  
MINIMUM TEMPERATURE (F) 24 -2 1987  
 
SUNRISE AND SUNSET  
JANUARY 23 2021.......SUNRISE 7:23 AM EST SUNSET 5:21 PM EST  
JANUARY 24 2021.......SUNRISE 7:22 AM EST SUNSET 5:22 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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