666  
CDUS41 KLWX 182126  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
526 PM EDT SAT MAY 18 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 18 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 63 3:59 PM 91 1987 75 -12 70  
MINIMUM 61 8:11 AM 33 1973 54 7 46  
AVERAGE 62 64 -2 58  
 
PRECIPITATION (IN)  
TODAY 0.64 3.13 1988 0.15 0.49 0.00  
MONTH TO DATE 3.11 2.68 0.43 0.75  
SINCE MAR 1 8.74 9.65 -0.91 5.62  
SINCE JAN 1 16.19 15.20 0.99 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 3 3 0 7  
MONTH TO DATE 48 84 -36 92  
SINCE MAR 1 727 1051 -324 875  
SINCE JUL 1 3691 4561 -870 3839  
 
COOLING  
TODAY 0 3 -3 0  
MONTH TO DATE 44 35 9 16  
SINCE MAR 1 88 57 31 61  
SINCE JAN 1 91 57 34 61    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION S (160)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION SE (150)  
AVERAGE WIND SPEED 3.9  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 3:00 AM  
LOWEST 81 10:00 AM  
AVERAGE 87  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 76 92 1996  
1997  
MINIMUM TEMPERATURE (F) 54 36 2002  
 
SUNRISE AND SUNSET  
MAY 18 2024...........SUNRISE 5:54 AM EDT SUNSET 8:19 PM EDT  
MAY 19 2024...........SUNRISE 5:53 AM EDT SUNSET 8:20 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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