389  
CDUS41 KLWX 182121  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
421 PM EST THU JAN 18 2024  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 18 2024
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 35 1:39 PM 70 1990 42 -7 58  
MINIMUM 11 7:02 AM -1 1994 25 -14 40  
AVERAGE 23 34 -11 49  
 
PRECIPITATION (IN)  
TODAY 0.00 1.18 1980 0.09 -0.09 T  
MONTH TO DATE 3.96 1.70 2.26 0.46  
SINCE DEC 1 9.71 5.00 4.71 5.41  
SINCE JAN 1 3.96 1.70 2.26 0.46  
 
SNOWFALL (IN)  
TODAY 0.0 4.2 1984 0.2 -0.2 0.0  
MONTH TO DATE 4.4 3.4 1.0 0.0  
SINCE DEC 1 4.9 6.2 -1.3 T  
SINCE JUL 1 4.9 6.5 -1.6 T  
SNOW DEPTH 2  
 
DEGREE DAYS  
HEATING  
TODAY 42 31 11 16  
MONTH TO DATE 527 554 -27 385  
SINCE DEC 1 1202 1399 -197 1247  
SINCE JUL 1 1973 2299 -326 2081  
 
COOLING  
TODAY 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 9 HIGHEST WIND DIRECTION S (160)  
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION S (170)  
AVERAGE WIND SPEED 1.6  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 80 7:00 AM  
LOWEST 40 3:00 PM  
AVERAGE 60  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 65 1972  
MINIMUM TEMPERATURE (F) 25 -6 1994  
 
SUNRISE AND SUNSET  
JANUARY 18 2024.......SUNRISE 7:26 AM EST SUNSET 5:15 PM EST  
JANUARY 19 2024.......SUNRISE 7:25 AM EST SUNSET 5:16 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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