553  
CDUS41 KLWX 100534  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1234 AM EST WED JAN 10 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 9 2024  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2024  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 59 10:28 PM 64 2008 42 17 50  
MINIMUM 38 5:33 AM -8 1970 26 12 27  
AVERAGE 49 34 15 39  
 
PRECIPITATION (IN)  
YESTERDAY 1.76R 1.39 1964 0.09 1.67 0.00  
MONTH TO DATE 2.74 0.83 1.91 T  
SINCE DEC 1 8.49 4.13 4.36 4.95  
SINCE JAN 1 2.74 0.83 1.91 T  
 
SNOWFALL (IN)  
YESTERDAY 0.0 3.5 1997 0.2 -0.2 0.0  
MONTH TO DATE T 1.3 -1.3 0.0  
SINCE DEC 1 0.5 4.1 -3.6 T  
SINCE JUL 1 0.5 4.4 -3.9 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 16 31 -15 26  
MONTH TO DATE 238 275 -37 161  
SINCE DEC 1 913 1120 -207 1023  
SINCE JUL 1 1684 2020 -336 1857  
 
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 31 HIGHEST WIND DIRECTION SE (140)  
HIGHEST GUST SPEED 50 HIGHEST GUST DIRECTION SE (130)  
AVERAGE WIND SPEED 12.3  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 9:00 PM  
LOWEST 64 12:00 AM  
AVERAGE 79  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 59 2016  
MINIMUM TEMPERATURE (F) 25 0 1982  
 
SUNRISE AND SUNSET  
JANUARY 10 2024.......SUNRISE 7:28 AM EST SUNSET 5:06 PM EST  
JANUARY 11 2024.......SUNRISE 7:28 AM EST SUNSET 5:07 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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