145  
CDUS41 KLWX 170633  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
233 AM EDT WED APR 17 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 16 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 78 4:04 PM 91 2002 67 11 82  
MINIMUM 48 5:43 AM 28 1981 43 5 54  
AVERAGE 63 55 8 68  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.43 1993 0.11 -0.11 T  
MONTH TO DATE 1.43 1.76 -0.33 0.36  
SINCE MAR 1 5.32 5.26 0.06 1.93  
SINCE JAN 1 12.77 10.81 1.96 5.56  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1988 0.0 0.0 0.0  
MONTH TO DATE T 0.1 -0.1 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 2 10 -8 0  
MONTH TO DATE 134 206 -72 104  
SINCE MAR 1 598 853 -255 674  
SINCE JUL 1 3562 4363 -801 3638  
 
COOLING  
YESTERDAY 0 1 -1 3  
MONTH TO DATE 16 5 11 36  
SINCE MAR 1 16 7 9 37  
SINCE JAN 1 19 7 12 37    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION N (20)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION N (20)  
AVERAGE WIND SPEED 5.9  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 61 6:00 AM  
LOWEST 27 12:00 PM  
AVERAGE 44  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 93 2002  
MINIMUM TEMPERATURE (F) 44 27 1983  
 
SUNRISE AND SUNSET  
APRIL 17 2024.........SUNRISE 6:30 AM EDT SUNSET 7:49 PM EDT  
APRIL 18 2024.........SUNRISE 6:28 AM EDT SUNSET 7:50 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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