045  
CDUS41 KLWX 030524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1224 AM EST SUN JAN 03 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 2 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 56 1:07 PM 67 2000 43 13 51  
MINIMUM 35 1:09 AM -7 1968 24 11 23  
AVERAGE 46 33 13 37  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.40 1979 0.08 -0.08 T  
MONTH TO DATE 0.83 0.16 0.67 T  
SINCE DEC 1 6.64 3.12 3.52 2.97  
SINCE JAN 1 0.83 0.16 0.67 T  
 
SNOWFALL (IN)  
YESTERDAY 0.0 3.0 1987 0.1 -0.1 0.0  
2014  
MONTH TO DATE 0.0 0.3 -0.3 0.0  
SINCE DEC 1 2.4 3.8 -1.4 0.6  
SINCE JUL 1 2.4 4.3 -1.9 0.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 19 32 -13 28  
MONTH TO DATE 47 64 -17 55  
SINCE DEC 1 849 946 -97 855  
SINCE JUL 1 1516 1862 -346 1718  
 
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 W (290)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 6.7  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 4:00 AM  
LOWEST 55 2:00 PM  
AVERAGE 78  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 68 2000  
MINIMUM TEMPERATURE (F) 24 1 2018  
 
SUNRISE AND SUNSET  
JANUARY 3 2021.......SUNRISE 7:29 AM EST SUNSET 5:00 PM EST  
JANUARY 4 2021.......SUNRISE 7:29 AM EST SUNSET 5:01 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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