600  
CDUS41 KLWX 022023  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
323 PM EST SAT JAN 02 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 1 2021
 
 
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)  
YESTERDAY  
MAXIMUM 39 12:42 AM 68 2005 43 -4 50  
MINIMUM 34 9:39 PM -6 1968 24 10 26  
AVERAGE 37 33 4 38  
 
PRECIPITATION (IN)  
YESTERDAY 0.83 1.73 2003 0.08 0.75 0.00  
MONTH TO DATE 0.83 0.08 0.75 0.00  
SINCE DEC 1 6.64 3.04 3.60 2.97  
SINCE JAN 1 0.83 0.08 0.75 0.00  
 
SNOWFALL (IN)  
YESTERDAY 0.0 6.9 1971 0.2 -0.2 0.0  
MONTH TO DATE 0.0 0.2 -0.2 0.0  
SINCE DEC 1 2.4 3.7 -1.3 0.6  
SINCE JUL 1 2.4 4.2 -1.8 0.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 28 32 -4 27  
MONTH TO DATE 28 32 -4 27  
SINCE DEC 1 830 914 -84 827  
SINCE JUL 1 1497 1830 -333 1690  
 
COOLING  
YESTERDAY 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 22 HIGHEST WIND DIRECTION E (110)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION E (110)  
AVERAGE WIND SPEED 5.5  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 5:00 PM  
LOWEST 62 10:00 AM  
AVERAGE 79  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 67 2000  
MINIMUM TEMPERATURE (F) 24 -7 1968  
 
SUNRISE AND SUNSET  
JANUARY 2 2021.......SUNRISE 7:29 AM EST SUNSET 5:00 PM EST  
JANUARY 3 2021.......SUNRISE 7:29 AM EST SUNSET 5:00 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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