799  
CDUS41 KLWX 102126  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
426 PM EST SUN JAN 10 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 10 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 48 3:39 PM 59 2016 42 6 56  
MINIMUM 32 4:21 AM 0 1982 24 8 34  
AVERAGE 40 33 7 45  
 
PRECIPITATION (IN)  
TODAY 0.00 1.00 2016 0.08 -0.08 0.00  
MONTH TO DATE 1.14 0.81 0.33 1.00  
SINCE DEC 1 6.95 3.77 3.18 3.97  
SINCE JAN 1 1.14 0.81 0.33 1.00  
 
SNOWFALL (IN)  
TODAY 0.0 6.2 1965 0.2 -0.2 0.0  
MONTH TO DATE 0.0 1.8 -1.8 2.0  
SINCE DEC 1 2.4 5.3 -2.9 2.6  
SINCE JUL 1 2.4 5.8 -3.4 2.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 25 32 -7 20  
MONTH TO DATE 266 320 -54 256  
SINCE DEC 1 1068 1202 -134 1056  
SINCE JUL 1 1735 2118 -383 1919  
 
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 18 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 10.0  
 
SKY COVER  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 64 2:00 AM  
LOWEST 35 2:00 PM  
AVERAGE 50  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 71 1975  
MINIMUM TEMPERATURE (F) 24 -5 1988  
 
SUNRISE AND SUNSET  
JANUARY 10 2021.......SUNRISE 7:28 AM EST SUNSET 5:07 PM EST  
JANUARY 11 2021.......SUNRISE 7:28 AM EST SUNSET 5:08 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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