477  
CDUS41 KLWX 262121  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
421 PM EST SAT DEC 26 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 26 2020
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
CLIMATE RECORD PERIOD: 1960 TO 2020  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 35 3:41 PM 71 1964 43 -8 58  
MINIMUM 20 7:35 AM -1 1983 25 -5 26  
AVERAGE 28 34 -6 42  
 
PRECIPITATION (IN)  
TODAY 0.00 1.41 2012 0.09 -0.09 0.00  
MONTH TO DATE 5.81 2.57 3.24 2.34  
SINCE DEC 1 5.81 2.57 3.24 2.34  
SINCE JAN 1 49.46 41.15 8.31 40.18  
 
SNOWFALL (IN)  
TODAY 0.0 6.1 1969 0.2 -0.2 0.0  
MONTH TO DATE 2.4 2.8 -0.4 0.6  
SINCE DEC 1 2.4 2.8 -0.4 0.6  
SINCE JUL 1 2.4 3.3 -0.9 0.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 37 31 6 23  
MONTH TO DATE 666 727 -61 716  
SINCE DEC 1 666 727 -61 716  
SINCE JUL 1 1333 1643 -310 1579  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1406 1178 228 1524    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 8.1  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 65 7:00 AM  
LOWEST 36 3:00 PM  
AVERAGE 51  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 73 1971  
MINIMUM TEMPERATURE (F) 25 1 1989  
 
SUNRISE AND SUNSET  
DECEMBER 26 2020......SUNRISE 7:27 AM EST SUNSET 4:54 PM EST  
DECEMBER 27 2020......SUNRISE 7:28 AM EST SUNSET 4:55 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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