359  
CDUS41 KLWX 072126  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
426 PM EST THU JAN 07 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 7 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 46 3:34 PM 71 2008 42 4 40  
MINIMUM 32 7:04 AM -1 2018 24 8 26  
AVERAGE 39 33 6 33  
 
PRECIPITATION (IN)  
TODAY 0.00 1.56 1996 0.09 -0.09 0.32  
MONTH TO DATE 1.14 0.57 0.57 1.00  
SINCE DEC 1 6.95 3.53 3.42 3.97  
SINCE JAN 1 1.14 0.57 0.57 1.00  
 
SNOWFALL (IN)  
TODAY 0.0 19.8 1996 0.2 -0.2 2.0  
MONTH TO DATE 0.0 1.2 -1.2 2.0  
SINCE DEC 1 2.4 4.7 -2.3 2.6  
SINCE JUL 1 2.4 5.2 -2.8 2.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 26 32 -6 32  
MONTH TO DATE 182 224 -42 172  
SINCE DEC 1 984 1106 -122 972  
SINCE JUL 1 1651 2022 -371 1835  
 
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 21 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 11.1  
 
SKY COVER  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 75 7:00 AM  
LOWEST 43 3:00 PM  
AVERAGE 59  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 70 2008  
MINIMUM TEMPERATURE (F) 24 -4 1970  
 
SUNRISE AND SUNSET  
JANUARY 7 2021.......SUNRISE 7:29 AM EST SUNSET 5:04 PM EST  
JANUARY 8 2021.......SUNRISE 7:29 AM EST SUNSET 5:05 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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