588  
CDUS41 KLWX 240529  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
129 AM EDT SUN SEP 24 2023  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 23 2023
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2023  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 62 11:59 PM 94 2019 77 -15 69  
MINIMUM 57 8:04 AM 33 1983 55 2 51  
AVERAGE 60 66 -6 60  
 
PRECIPITATION (IN)  
YESTERDAY 1.51 1.74 2003 0.12 1.39 0.00  
MONTH TO DATE 5.19 2.98 2.21 2.81  
SINCE SEP 1 5.19 2.98 2.21 2.81  
SINCE JAN 1 24.41 32.20 -7.79 30.31  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE T 0.0 0.0 0.0  
SINCE SEP 1 T 0.0 0.0 0.0  
SINCE JUL 1 T 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 5 2 3 5  
MONTH TO DATE 6 20 -14 5  
SINCE SEP 1 6 20 -14 5  
SINCE JUL 1 6 21 -15 5  
 
COOLING  
YESTERDAY 0 3 -3 0  
MONTH TO DATE 209 134 75 175  
SINCE SEP 1 209 134 75 175  
SINCE JAN 1 1324 1190 134 1353    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION NE (30)  
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION N (20)  
AVERAGE WIND SPEED 15.1  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 11:00 PM  
LOWEST 83 12:00 AM  
AVERAGE 88  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 76 97 2010  
MINIMUM TEMPERATURE (F) 55 30 1974  
 
SUNRISE AND SUNSET  
SEPTEMBER 24 2023.....SUNRISE 6:59 AM EDT SUNSET 7:04 PM EDT  
SEPTEMBER 25 2023.....SUNRISE 7:00 AM EDT SUNSET 7:02 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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