007  
CDUS41 KLWX 272127  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
427 PM EST WED JAN 27 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 27 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 44 2:36 PM 71 1974 43 1 50  
MINIMUM 35 6:46 AM -9 1987 24 11 31  
AVERAGE 40 34 6 41  
 
PRECIPITATION (IN)  
TODAY 0.00 0.95 1976 0.08 -0.08 0.00  
MONTH TO DATE 1.57 2.30 -0.73 3.33  
SINCE DEC 1 7.38 5.26 2.12 6.30  
SINCE JAN 1 1.57 2.30 -0.73 3.33  
 
SNOWFALL (IN)  
TODAY 0.0 2.0 2009 0.3 -0.3 0.0  
MONTH TO DATE 0.2 6.1 -5.9 2.3  
SINCE DEC 1 2.6 9.6 -7.0 2.9  
SINCE JUL 1 2.6 10.1 -7.5 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 25 31 -6 24  
MONTH TO DATE 760 863 -103 689  
SINCE DEC 1 1562 1745 -183 1489  
SINCE JUL 1 2229 2661 -432 2352  
 
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 20 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 7.8  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 12:00 AM  
LOWEST 50 3:00 PM  
AVERAGE 75  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 68 2002  
MINIMUM TEMPERATURE (F) 24 -17 1987  
 
SUNRISE AND SUNSET  
JANUARY 27 2021.......SUNRISE 7:20 AM EST SUNSET 5:26 PM EST  
JANUARY 28 2021.......SUNRISE 7:19 AM EST SUNSET 5:27 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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