068  
CDUS41 KLWX 060529  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1229 AM EST WED JAN 06 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 5 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 40 2:29 PM 69 1997 42 -2 43  
MINIMUM 37 3:31 PM 5 1970 24 13 27  
AVERAGE 39 33 6 35  
 
PRECIPITATION (IN)  
YESTERDAY 0.01 1.11 1993 0.09 -0.08 0.00  
MONTH TO DATE 1.14 0.40 0.74 0.68  
SINCE DEC 1 6.95 3.36 3.59 3.65  
SINCE JAN 1 1.14 0.40 0.74 0.68  
 
SNOWFALL (IN)  
YESTERDAY 0.0 6.4 1980 0.1 -0.1 0.0  
MONTH TO DATE 0.0 0.8 -0.8 0.0  
SINCE DEC 1 2.4 4.3 -1.9 0.6  
SINCE JUL 1 2.4 4.8 -2.4 0.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 26 32 -6 30  
MONTH TO DATE 129 160 -31 115  
SINCE DEC 1 931 1042 -111 915  
SINCE JUL 1 1598 1958 -360 1778  
 
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 15 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 3.9  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 9:00 AM  
LOWEST 79 11:00 PM  
AVERAGE 88  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 71 2007  
MINIMUM TEMPERATURE (F) 24 4 1977  
1999  
 
SUNRISE AND SUNSET  
JANUARY 6 2021.......SUNRISE 7:29 AM EST SUNSET 5:03 PM EST  
JANUARY 7 2021.......SUNRISE 7:29 AM EST SUNSET 5:04 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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