808  
CDUS41 KLWX 172125  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
525 PM EDT FRI MAY 17 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 17 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 71 12:55 PM 93 1960 75 -4 75  
MINIMUM 59 3:53 AM 30 1984 53 6 53  
AVERAGE 65 64 1 64  
 
PRECIPITATION (IN)  
TODAY T 1.22 1970 0.16 -0.16 0.00  
MONTH TO DATE 2.47 2.53 -0.06 0.75  
SINCE MAR 1 8.10 9.50 -1.40 5.62  
SINCE JAN 1 15.55 15.05 0.50 9.25  
 
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 0 4 -4 1  
MONTH TO DATE 45 81 -36 85  
SINCE MAR 1 724 1048 -324 868  
SINCE JUL 1 3688 4558 -870 3832  
 
COOLING  
TODAY 0 3 -3 0  
MONTH TO DATE 44 32 12 16  
SINCE MAR 1 88 54 34 61  
SINCE JAN 1 91 54 37 61    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION SE (120)  
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION SE (120)  
AVERAGE WIND SPEED 4.1  
 
SKY COVER  
AVERAGE SKY COVER 0.8  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 4:00 AM  
LOWEST 63 11:00 AM  
AVERAGE 77  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 91 1987  
MINIMUM TEMPERATURE (F) 54 33 1973  
 
SUNRISE AND SUNSET  
MAY 17 2024...........SUNRISE 5:55 AM EDT SUNSET 8:18 PM EDT  
MAY 18 2024...........SUNRISE 5:54 AM EDT SUNSET 8:19 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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