434  
CDUS41 KLWX 200522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1222 AM EST MON JAN 20 2025  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 19 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 41 5:44 AM 65 1972 42 -1 32  
MINIMUM 24 11:57 PM -6 1994 25 -1 21  
AVERAGE 33 34 -1 27  
 
PRECIPITATION (IN)  
YESTERDAY 0.30 1.36 1987 0.09 0.21 0.35  
MONTH TO DATE 1.15 1.79 -0.64 4.31  
SINCE DEC 1 4.49 5.09 -0.60 10.06  
SINCE JAN 1 1.15 1.79 -0.64 4.31  
 
SNOWFALL (IN)  
YESTERDAY 1.4 4.9 2024 0.3 1.1 4.9  
MONTH TO DATE 10.5 3.7 6.8 9.3  
SINCE DEC 1 10.6 6.5 4.1 9.8  
SINCE JUL 1 10.6 6.8 3.8 9.8  
SNOW DEPTH 1  
 
DEGREE DAYS  
HEATING  
YESTERDAY 32 31 1 38  
MONTH TO DATE 649 585 64 565  
SINCE DEC 1 1478 1430 48 1240  
SINCE JUL 1 2146 2330 -184 2011  
 
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 23 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 8.3  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
MIXED PRECIP  
RAIN  
LIGHT RAIN  
SNOW  
LIGHT SNOW  
SLEET  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 1:00 PM  
LOWEST 68 11:00 PM  
AVERAGE 80  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 63 2006  
MINIMUM TEMPERATURE (F) 25 -7 1985  
 
SUNRISE AND SUNSET  
JANUARY 20 2025.......SUNRISE 7:25 AM EST SUNSET 5:18 PM EST  
JANUARY 21 2025.......SUNRISE 7:24 AM EST SUNSET 5:19 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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