212  
CDUS41 KLWX 142122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
522 PM EDT TUE SEP 14 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 14 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 89 1:57 PM 95 1998 80 9 78  
MINIMUM 68 5:56 AM 37 1985 59 9 62  
AVERAGE 79 69 10 70  
 
PRECIPITATION (IN)  
TODAY 0.00 5.52 1966 0.14 -0.14 0.00  
MONTH TO DATE 2.43 1.75 0.68 1.16  
SINCE SEP 1 2.43 1.75 0.68 1.16  
SINCE JAN 1 27.02 30.97 -3.95 35.38  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 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 0.0  
SINCE JUL 1 0.0 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 1 -1 0  
MONTH TO DATE 0 5 -5 0  
SINCE SEP 1 0 5 -5 0  
SINCE JUL 1 0 6 -6 0  
 
COOLING  
TODAY 14 5 9 5  
MONTH TO DATE 91 97 -6 116  
SINCE SEP 1 91 97 -6 116  
SINCE JAN 1 1343 1153 190 1368    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION S (160)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION SE (150)  
AVERAGE WIND SPEED 2.4  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 2:00 AM  
LOWEST 55 1:00 PM  
AVERAGE 76  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 80 95 1993  
1998  
MINIMUM TEMPERATURE (F) 58 38 1985  
 
SUNRISE AND SUNSET  
SEPTEMBER 14 2021.....SUNRISE 6:51 AM EDT SUNSET 7:19 PM EDT  
SEPTEMBER 15 2021.....SUNRISE 6:51 AM EDT SUNSET 7:18 PM EDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab VA Page
The Nexlab MD Page
The Nexlab WV Page Main Text Page