425  
CDUS41 KLWX 312136  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
436 PM EST SUN DEC 31 2023  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 31 2023
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 51 2:25 PM 73 1992 43 8 57  
MINIMUM 35 6:34 AM 1 1993 27 8 50  
AVERAGE 43 35 8 54  
 
PRECIPITATION (IN)  
TODAY T 1.90 1975 0.09 -0.09 0.25  
MONTH TO DATE 5.75 3.30 2.45 4.95  
SINCE DEC 1 5.75 3.30 2.45 4.95  
SINCE JAN 1 34.78 43.24 -8.46 40.76  
 
SNOWFALL (IN)  
TODAY 0.0 8.5 1970 0.1 -0.1 0.0  
MONTH TO DATE 0.5 2.8 -2.3 T  
SINCE DEC 1 0.5 2.8 -2.3 T  
SINCE JUL 1 0.5 3.1 -2.6 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 22 30 -8 11  
MONTH TO DATE 675 846 -171 862  
SINCE DEC 1 675 846 -171 862  
SINCE JUL 1 1446 1746 -300 1696  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1380 1231 149 1376    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 6.4  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 64 8:00 AM  
LOWEST 44 2:00 PM  
AVERAGE 54  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 68 2005  
MINIMUM TEMPERATURE (F) 27 -6 1968  
 
SUNRISE AND SUNSET  
DECEMBER 31 2023......SUNRISE 7:28 AM EST SUNSET 4:57 PM EST  
JANUARY 1 2024.......SUNRISE 7:28 AM EST SUNSET 4:58 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab VA Page
The Nexlab MD Page
The Nexlab WV Page Main Text Page