765  
CDUS41 KLWX 112129  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
429 PM EST MON JAN 11 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 11 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 42 3:24 PM 71 1975 42 0 70  
MINIMUM 22 3:44 AM -5 1988 24 -2 48  
AVERAGE 32 33 -1 59  
 
PRECIPITATION (IN)  
TODAY 0.00 0.90 1991 0.09 -0.09 0.01  
MONTH TO DATE 1.14 0.90 0.24 1.01  
SINCE DEC 1 6.95 3.86 3.09 3.98  
SINCE JAN 1 1.14 0.90 0.24 1.01  
 
SNOWFALL (IN)  
TODAY 0.0 2.2 1991 0.2 -0.2 0.0  
MONTH TO DATE 0.0 2.0 -2.0 2.0  
SINCE DEC 1 2.4 5.5 -3.1 2.6  
SINCE JUL 1 2.4 6.0 -3.6 2.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 33 32 1 6  
MONTH TO DATE 302 352 -50 262  
SINCE DEC 1 1104 1234 -130 1062  
SINCE JUL 1 1771 2150 -379 1925  
 
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 7 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 9 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 0.9  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 5:00 AM  
LOWEST 53 3:00 PM  
AVERAGE 73  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 70 2017  
2018  
MINIMUM TEMPERATURE (F) 24 -4 1977  
 
SUNRISE AND SUNSET  
JANUARY 11 2021.......SUNRISE 7:28 AM EST SUNSET 5:08 PM EST  
JANUARY 12 2021.......SUNRISE 7:28 AM EST SUNSET 5:09 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab VA Page
The Nexlab MD Page
The Nexlab WV Page Main Text Page