313  
CDUS41 KLWX 152122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
422 PM EST FRI JAN 15 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 15 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 52 1:01 PM 68 2007 42 10 57  
MINIMUM 27 6:30 AM -7 1964 24 3 40  
AVERAGE 40 33 7 49  
 
PRECIPITATION (IN)  
TODAY 0.00 1.56 1995 0.09 -0.09 T  
MONTH TO DATE 1.14 1.25 -0.11 1.47  
SINCE DEC 1 6.95 4.21 2.74 4.44  
SINCE JAN 1 1.14 1.25 -0.11 1.47  
 
SNOWFALL (IN)  
TODAY 0.0 1.4 1968 0.3 -0.3 0.0  
MONTH TO DATE 0.0 3.0 -3.0 2.0  
SINCE DEC 1 2.4 6.5 -4.1 2.6  
SINCE JUL 1 2.4 7.0 -4.6 2.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 25 32 -7 16  
MONTH TO DATE 410 480 -70 329  
SINCE DEC 1 1212 1362 -150 1129  
SINCE JUL 1 1879 2278 -399 1992  
 
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 16 HIGHEST WIND DIRECTION SE (140)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 6.0  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 85 4:00 AM  
LOWEST 58 2:00 PM  
AVERAGE 72  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 65 1974  
MINIMUM TEMPERATURE (F) 24 -4 1964  
 
SUNRISE AND SUNSET  
JANUARY 15 2021.......SUNRISE 7:27 AM EST SUNSET 5:12 PM EST  
JANUARY 16 2021.......SUNRISE 7:26 AM EST SUNSET 5:13 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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