683  
CDUS41 KLWX 230523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT SUN SEP 23 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 22 2018
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 76 147 PM 94 2010 77 -1 83  
1980  
1970  
MINIMUM 61 1123 PM 35 1962 54 7 61  
AVERAGE 69 65 4 72  
 
PRECIPITATION (IN)  
YESTERDAY 0.02 1.57 1982 0.13 -0.11 0.00  
MONTH TO DATE 3.82 2.87 0.95 1.75  
SINCE SEP 1 3.82 2.87 0.95 1.75  
SINCE JAN 1 47.08 30.87 16.21 34.75  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 3 -3 0  
MONTH TO DATE 4 24 -20 30  
SINCE SEP 1 4 24 -20 30  
SINCE JUL 1 4 26 -22 31  
 
COOLING  
YESTERDAY 4 3 1 7  
MONTH TO DATE 219 123 96 95  
SINCE SEP 1 219 123 96 95  
SINCE JAN 1 1403 1139 264 1156    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NE (30)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 9.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 200 AM  
LOWEST 60 1200 PM  
AVERAGE 80  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 93 2010  
2005  
MINIMUM TEMPERATURE (F) 53 33 1983  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 23 2018.....SUNRISE 658 AM EDT SUNSET 705 PM EDT  
SEPTEMBER 24 2018.....SUNRISE 659 AM EDT SUNSET 704 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