776  
CDUS41 KLWX 232130  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
530 PM EDT SAT SEP 23 2017  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 23 2017
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 86 357 PM 93 2010 77 9 91  
2005  
MINIMUM 58 633 AM 33 1983 53 5 56  
AVERAGE 72 65 7 74  
 
PRECIPITATION (IN)  
TODAY 0.00 1.74 2003 0.13 -0.13 0.00  
MONTH TO DATE 1.75 3.00 -1.25 0.40  
SINCE SEP 1 1.75 3.00 -1.25 0.40  
SINCE JAN 1 34.75 31.00 3.75 28.40  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0  
SINCE JUL 1 T 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 3 -3 0  
MONTH TO DATE 30 27 3 0  
SINCE SEP 1 30 27 3 0  
SINCE JUL 1 31 29 2 0  
 
COOLING  
TODAY 7 3 4 9  
MONTH TO DATE 102 126 -24 251  
SINCE SEP 1 102 126 -24 251  
SINCE JAN 1 1163 1142 21 1514    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (360)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION N (20)  
AVERAGE WIND SPEED 4.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 42 400 PM  
AVERAGE 71  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 76 97 2010  
MINIMUM TEMPERATURE (F) 53 30 1974  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 23 2017.....SUNRISE 659 AM EDT SUNSET 705 PM EDT  
SEPTEMBER 24 2017.....SUNRISE 659 AM EDT SUNSET 703 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