618  
CDUS41 KLWX 071415  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
910 AM EST TUE JAN 07 2025  
 
..CORRECTED SNOWFALL AMOUNT FOR JANUARY 6 2025..  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 6 2025  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 30 11:40 PM 71 2007 43 -13 38  
MINIMUM 26 5:31 PM 4 1977 26 0 26  
1999  
AVERAGE 28 34 -6 32  
 
PRECIPITATION (IN)  
YESTERDAY 0.64 0.97 2024 0.09 0.55 0.97  
MONTH TO DATE 0.69 0.56 0.13 0.98  
SINCE DEC 1 4.03 3.86 0.17 6.73  
SINCE JAN 1 0.69 0.56 0.13 0.98  
 
SNOWFALL (IN)  
YESTERDAY 6.0 R 4.2 2015 0.1 5.9 T  
MONTH TO DATE 6.2 0.8 5.4 T  
SINCE DEC 1 6.3 3.6 2.7 0.5  
SINCE JUL 1 6.3 3.9 1.5 0.5  
SNOW DEPTH 4  
 
DEGREE DAYS  
HEATING  
YESTERDAY 37 31 6 33  
MONTH TO DATE 194 182 12 173  
SINCE DEC 1 1023 1027 -4 848  
SINCE JUL 1 1691 1927 -236 1619  
 
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 24 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 35 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 9.4  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT SNOW  
SLEET  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 2:00 AM  
LOWEST 63 12:00 AM  
AVERAGE 78  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 71 2008  
MINIMUM TEMPERATURE (F) 26 -1 2018  
 
SUNRISE AND SUNSET  
JANUARY 7 2025.......SUNRISE 7:29 AM EST SUNSET 5:04 PM EST  
JANUARY 8 2025.......SUNRISE 7:29 AM EST SUNSET 5:05 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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