756  
CDUS41 KLWX 302120  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
420 PM EST SAT DEC 30 2023  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 30 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 3:16 PM 67 1990 44 7 66  
MINIMUM 30 5:13 AM 4 1963 27 3 28  
AVERAGE 41 35 6 47  
 
PRECIPITATION (IN)  
TODAY 0.00 0.87 1969 0.09 -0.09 0.00  
MONTH TO DATE 5.75 3.21 2.54 4.70  
SINCE DEC 1 5.75 3.21 2.54 4.70  
SINCE JAN 1 34.78 43.15 -8.37 40.51  
 
SNOWFALL (IN)  
TODAY 0.0 0.9 1977 0.2 -0.2 0.0  
MONTH TO DATE 0.5 2.7 -2.2 T  
SINCE DEC 1 0.5 2.7 -2.2 T  
SINCE JUL 1 0.5 3.0 -2.5 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 24 30 -6 18  
MONTH TO DATE 653 816 -163 851  
SINCE DEC 1 653 816 -163 851  
SINCE JUL 1 1424 1716 -292 1685  
 
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 W (250)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION SW (230)  
AVERAGE WIND SPEED 7.0  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 78 5:00 AM  
LOWEST 48 2:00 PM  
AVERAGE 63  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 73 1992  
MINIMUM TEMPERATURE (F) 27 1 1993  
 
SUNRISE AND SUNSET  
DECEMBER 30 2023......SUNRISE 7:28 AM EST SUNSET 4:57 PM EST  
DECEMBER 31 2023......SUNRISE 7:28 AM EST SUNSET 4:57 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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