437  
CDUS41 KLWX 170523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT THU OCT 17 2024  
   
...............................  
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 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 59 3:42 PM 85 1989 68 -9 63  
MINIMUM 38 4:18 AM 30 1986 45 -7 43  
AVERAGE 49 56 -7 53  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.10 2002 0.12 -0.12 T  
MONTH TO DATE 0.13 1.93 -1.80 0.52  
SINCE SEP 1 3.40 5.87 -2.47 7.17  
SINCE JAN 1 29.18 35.09 -5.91 26.39  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 1977 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE SEP 1 0.0 0.0 0.0 T  
SINCE JUL 1 0.0 0.0 0.0 T  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 16 9 7 12  
MONTH TO DATE 83 108 -25 87  
SINCE SEP 1 95 153 -58 103  
SINCE JUL 1 97 154 -57 103  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 14 19 -5 32  
SINCE SEP 1 151 171 -20 248  
SINCE JAN 1 1565 1227 338 1363    
...............................................................  
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 9.0  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 79 7:00 AM  
LOWEST 37 4:00 PM  
AVERAGE 58  
   
......................................................  
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 84 2016  
MINIMUM TEMPERATURE (F) 45 31 1981  
1982  
 
SUNRISE AND SUNSET  
OCTOBER 17 2024.......SUNRISE 7:22 AM EDT SUNSET 6:28 PM EDT  
OCTOBER 18 2024.......SUNRISE 7:23 AM EDT SUNSET 6:26 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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