715  
CDUS41 KLWX 230523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1223 AM EST SAT DEC 23 2023  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 22 2023
 
 
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)  
YESTERDAY  
MAXIMUM 50 2:26 PM 71 2013 45 5 53  
MINIMUM 29 7:38 AM 2 1989 28 1 29  
AVERAGE 40 36 4 41  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.14 2022 0.10 -0.10 2.14  
MONTH TO DATE 4.73 2.43 2.30 4.48  
SINCE DEC 1 4.73 2.43 2.30 4.48  
SINCE JAN 1 33.76 42.37 -8.61 40.29  
 
SNOWFALL (IN)  
YESTERDAY 0.0 3.3 1962 0.1 -0.1 T  
MONTH TO DATE 0.5 1.8 -1.3 T  
SINCE DEC 1 0.5 1.8 -1.3 T  
SINCE JUL 1 0.5 2.1 -1.6 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 25 29 -4 24  
MONTH TO DATE 505 580 -75 575  
SINCE DEC 1 505 580 -75 575  
SINCE JUL 1 1276 1480 -204 1409  
 
COOLING  
YESTERDAY 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 MM HIGHEST WIND DIRECTION MM  
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM  
AVERAGE WIND SPEED MM  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 85 6:00 AM  
LOWEST 42 3:00 PM  
AVERAGE 64  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 45 68 1990  
MINIMUM TEMPERATURE (F) 28 4 1989  
 
SUNRISE AND SUNSET  
DECEMBER 23 2023......SUNRISE 7:26 AM EST SUNSET 4:52 PM EST  
DECEMBER 24 2023......SUNRISE 7:26 AM EST SUNSET 4:52 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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