213  
CDUS41 KLWX 262133  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
533 PM EDT SUN SEP 26 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 26 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 75 3:55 PM 93 2007 75 0 74  
MINIMUM 53 6:10 AM 38 1964 54 -1 61  
1983  
AVERAGE 64 65 -1 68  
 
PRECIPITATION (IN)  
TODAY 0.00 2.15 1975 0.13 -0.13 0.01  
MONTH TO DATE 4.72 3.37 1.35 1.80  
SINCE SEP 1 4.72 3.37 1.35 1.80  
SINCE JAN 1 29.31 32.59 -3.28 36.02  
 
SNOWFALL (IN)  
TODAY MM MM MM 0.0 MM 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE SEP 1 0.0 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0 0.0  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 1 3 -2 0  
MONTH TO DATE 9 28 -19 58  
SINCE SEP 1 9 28 -19 58  
SINCE JUL 1 9 29 -20 58  
 
COOLING  
TODAY 0 3 -3 3  
MONTH TO DATE 167 143 24 120  
SINCE SEP 1 167 143 24 120  
SINCE JAN 1 1419 1199 220 1372    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION W (290)  
AVERAGE WIND SPEED 9.2  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 80 5:00 AM  
LOWEST 34 3:00 PM  
AVERAGE 57  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 96 1998  
MINIMUM TEMPERATURE (F) 53 35 1984  
 
SUNRISE AND SUNSET  
SEPTEMBER 26 2021.....SUNRISE 7:01 AM EDT SUNSET 7:00 PM EDT  
SEPTEMBER 27 2021.....SUNRISE 7:02 AM EDT SUNSET 6:58 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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