996  
CDUS41 KLWX 010528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1228 AM EST THU FEB 01 2024  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 31 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 43 4:22 PM 66 2012 43 0 48  
MINIMUM 29 11:59 PM -7 1965 25 4 35  
AVERAGE 36 34 2 42  
 
PRECIPITATION (IN)  
YESTERDAY T 0.68 1985 0.09 -0.09 0.07  
MONTH TO DATE 6.00 2.94 3.06 1.36  
SINCE DEC 1 11.75 6.24 5.51 6.31  
SINCE JAN 1 6.00 2.94 3.06 1.36  
 
SNOWFALL (IN)  
YESTERDAY 0.0 4.7 1985 0.3 -0.3 0.0  
MONTH TO DATE 9.5 6.9 2.6 T  
SINCE DEC 1 10.0 9.7 0.3 T  
SINCE JUL 1 10.0 10.0 0.0 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 29 31 -2 23  
MONTH TO DATE 867 957 -90 703  
SINCE DEC 1 1542 1802 -260 1565  
SINCE JUL 1 2313 2702 -389 2399  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 3 0 3 0  
SINCE DEC 1 3 0 3 0  
SINCE JAN 1 3 0 3 0    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION NE (60)  
HIGHEST GUST SPEED 10 HIGHEST GUST DIRECTION NE (60)  
AVERAGE WIND SPEED 2.2  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 11:00 PM  
LOWEST 70 12:00 AM  
AVERAGE 81  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 75 2002  
MINIMUM TEMPERATURE (F) 25 2 1965  
 
SUNRISE AND SUNSET  
FEBRUARY 1 2024......SUNRISE 7:16 AM EST SUNSET 5:31 PM EST  
FEBRUARY 2 2024......SUNRISE 7:16 AM EST SUNSET 5:32 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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