308  
CDUS41 KLWX 260526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EDT TUE SEP 26 2023  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 25 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 71 12:46 PM 93 2010 76 -5 75  
MINIMUM 60 11:59 PM 33 1983 54 6 54  
AVERAGE 66 65 1 65  
 
PRECIPITATION (IN)  
YESTERDAY 0.02 2.67 1975 0.13 -0.11 T  
MONTH TO DATE 6.50 3.24 3.26 2.81  
SINCE SEP 1 6.50 3.24 3.26 2.81  
SINCE JAN 1 25.72 32.46 -6.74 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 0 3 -3 0  
MONTH TO DATE 6 25 -19 14  
SINCE SEP 1 6 25 -19 14  
SINCE JUL 1 6 26 -20 14  
 
COOLING  
YESTERDAY 1 3 -2 0  
MONTH TO DATE 211 140 71 175  
SINCE SEP 1 211 140 71 175  
SINCE JAN 1 1326 1196 130 1353    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NE (60)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NE (50)  
AVERAGE WIND SPEED 8.1  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 6:00 PM  
LOWEST 66 2:00 PM  
AVERAGE 80  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 93 2007  
MINIMUM TEMPERATURE (F) 54 38 1964  
1983  
 
SUNRISE AND SUNSET  
SEPTEMBER 26 2023.....SUNRISE 7:01 AM EDT SUNSET 7:01 PM EDT  
SEPTEMBER 27 2023.....SUNRISE 7:02 AM EDT SUNSET 6:59 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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