708  
CDUS41 KLWX 112128  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
528 PM EDT SAT MAY 11 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 11 2024  
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 67 2:08 PM 90 1993 74 -7 81  
MINIMUM 45 5:31 AM 29 1966 52 -7 45  
AVERAGE 56 63 -7 63  
 
PRECIPITATION (IN)  
TODAY T 3.73 2008 0.15 -0.15 0.00  
MONTH TO DATE 1.60 1.59 0.01 0.66  
SINCE MAR 1 7.23 8.56 -1.33 5.53  
SINCE JAN 1 14.68 14.11 0.57 9.16  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE MAR 1 T 4.0 -4.0 T  
SINCE JUL 1 11.7 21.0 -9.3 0.4  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 9 4 5 2  
MONTH TO DATE 32 57 -25 84  
SINCE MAR 1 711 1024 -313 867  
SINCE JUL 1 3675 4534 -859 3831  
 
COOLING  
TODAY 0 2 -2 0  
MONTH TO DATE 42 18 24 5  
SINCE MAR 1 86 40 46 50  
SINCE JAN 1 89 40 49 50    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 4.1  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 5:00 AM  
LOWEST 47 2:00 PM  
AVERAGE 70  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 74 90 2018  
MINIMUM TEMPERATURE (F) 52 34 1969  
 
SUNRISE AND SUNSET  
MAY 11 2024...........SUNRISE 6:00 AM EDT SUNSET 8:12 PM EDT  
MAY 12 2024...........SUNRISE 5:59 AM EDT SUNSET 8:13 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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