479  
CDUS41 KLWX 292124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
522 PM EDT SAT SEP 29 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 29 2018
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 78 252 PM 85 1986 74 4 73  
1973  
MINIMUM 56 634 AM 34 1978 50 6 49  
AVERAGE 67 62 5 61  
 
PRECIPITATION (IN)  
TODAY 0.00 2.23 1963 0.13 -0.13 0.00  
MONTH TO DATE 7.36 3.78 3.58 1.75  
SINCE SEP 1 7.36 3.78 3.58 1.75  
SINCE JAN 1 50.62 31.78 18.84 34.75  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 0 5 -5 4  
MONTH TO DATE 13 50 -37 34  
SINCE SEP 1 13 50 -37 34  
SINCE JUL 1 13 52 -39 35  
 
COOLING  
TODAY 2 2 0 0  
MONTH TO DATE 241 139 102 155  
SINCE SEP 1 241 139 102 155  
SINCE JAN 1 1425 1155 270 1216    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 5.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 45 300 PM  
AVERAGE 73  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 74 92 1986  
MINIMUM TEMPERATURE (F) 50 35 1993  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 29 2018.....SUNRISE 704 AM EDT SUNSET 656 PM EDT  
SEPTEMBER 30 2018.....SUNRISE 705 AM EDT SUNSET 654 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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