103  
CDUS41 KLWX 212126  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
526 PM EDT MON APR 21 2025  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 21 2025  
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 76 3:51 PM 89 1985 69 7 54  
MINIMUM 56 5:31 AM 29 1983 45 11 44  
AVERAGE 66 57 9 49  
 
PRECIPITATION (IN)  
TODAY T 2.20 1992 0.12 -0.12 0.00  
MONTH TO DATE 1.37 2.33 -0.96 1.45  
SINCE MAR 1 2.79 5.83 -3.04 5.34  
SINCE JAN 1 7.21 11.38 -4.17 12.79  
 
SNOWFALL (IN)  
TODAY 0.0 0.0 2001 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.1 -0.1 T  
SINCE MAR 1 0.0 4.0 -4.0 T  
SINCE JUL 1 15.5 21.0 -5.5 11.7  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 9 -9 16  
MONTH TO DATE 217 253 -36 161  
SINCE MAR 1 667 900 -233 625  
SINCE JUL 1 3989 4410 -421 3589  
 
COOLING  
TODAY 1 1 0 0  
MONTH TO DATE 15 10 5 19  
SINCE MAR 1 32 12 20 19  
SINCE JAN 1 32 12 20 22    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 8.7  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 64 1:00 AM  
LOWEST 51 3:00 PM  
AVERAGE 58  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 92 1985  
MINIMUM TEMPERATURE (F) 45 27 1975  
 
SUNRISE AND SUNSET  
APRIL 21 2025.........SUNRISE 6:24 AM EDT SUNSET 7:53 PM EDT  
APRIL 22 2025.........SUNRISE 6:23 AM EDT SUNSET 7:54 PM EDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
 
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