763  
CDUS41 KLWX 220527  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1227 AM EST WED JAN 22 2025  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 21 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 20 2:33 PM 63 2018 42 -22 32  
MINIMUM 10 7:01 AM -16 1984 25 -15 17  
AVERAGE 15 34 -19 25  
 
PRECIPITATION (IN)  
YESTERDAY T 0.94 1974 0.10 -0.10 0.00  
MONTH TO DATE 1.15 1.99 -0.84 4.31  
SINCE DEC 1 4.49 5.29 -0.80 10.06  
SINCE JAN 1 1.15 1.99 -0.84 4.31  
 
SNOWFALL (IN)  
YESTERDAY T 8.5 2014 0.3 -0.3 0.0  
MONTH TO DATE 10.5 4.2 6.3 9.5  
SINCE DEC 1 10.6 7.0 3.6 10.0  
SINCE JUL 1 10.6 7.3 3.3 10.0  
SNOW DEPTH 1  
 
DEGREE DAYS  
HEATING  
YESTERDAY 50 31 19 40  
MONTH TO DATE 745 647 98 651  
SINCE DEC 1 1574 1492 82 1326  
SINCE JUL 1 2242 2392 -150 2097  
 
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 13 HIGHEST WIND DIRECTION N (360)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 3.5  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 58 11:00 PM  
LOWEST 39 1:00 PM  
AVERAGE 49  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 68 1986  
MINIMUM TEMPERATURE (F) 25 -18 1984  
 
SUNRISE AND SUNSET  
JANUARY 22 2025.......SUNRISE 7:23 AM EST SUNSET 5:20 PM EST  
JANUARY 23 2025.......SUNRISE 7:23 AM EST SUNSET 5:21 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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