204  
CDUS41 KLWX 140526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EDT TUE MAY 14 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 13 2024  
 
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)  
YESTERDAY  
MAXIMUM 79 3:44 PM 92 2000 74 5 73  
MINIMUM 44 5:20 AM 32 1976 52 -8 60  
AVERAGE 62 63 -1 67  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.93 1971 0.15 -0.15 0.09  
MONTH TO DATE 2.04 1.90 0.14 0.75  
SINCE MAR 1 7.67 8.87 -1.20 5.62  
SINCE JAN 1 15.12 14.42 0.70 9.25  
 
SNOWFALL (IN)  
YESTERDAY 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  
YESTERDAY 3 4 -1 0  
MONTH TO DATE 41 65 -24 84  
SINCE MAR 1 720 1032 -312 867  
SINCE JUL 1 3684 4542 -858 3831  
 
COOLING  
YESTERDAY 0 2 -2 2  
MONTH TO DATE 42 22 20 12  
SINCE MAR 1 86 44 42 57  
SINCE JAN 1 89 44 45 57    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION SW (220)  
AVERAGE WIND SPEED 6.9  
 
SKY COVER  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 6:00 AM  
LOWEST 35 4:00 PM  
AVERAGE 64  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 89 2010  
MINIMUM TEMPERATURE (F) 52 32 1996  
2013  
 
SUNRISE AND SUNSET  
MAY 14 2024...........SUNRISE 5:58 AM EDT SUNSET 8:15 PM EDT  
MAY 15 2024...........SUNRISE 5:57 AM EDT SUNSET 8:16 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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