746  
CDUS41 KLWX 012121  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
521 PM EDT MON OCT 1 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 1 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 84 253 PM 90 1986 73 11 69  
MINIMUM 61 631 AM 31 1993 50 11 44  
AVERAGE 73 61 12 57  
 
PRECIPITATION (IN)  
TODAY 0.00 4.06 1979 0.11 -0.11 0.00  
MONTH TO DATE 0.00 0.11 -0.11 0.00  
SINCE SEP 1 7.36 4.03 3.33 1.75  
SINCE JAN 1 50.62 32.03 18.59 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 8  
MONTH TO DATE 0 5 -5 8  
SINCE SEP 1 13 61 -48 48  
SINCE JUL 1 13 63 -50 49  
 
COOLING  
TODAY 8 2 6 0  
MONTH TO DATE 8 2 6 0  
SINCE SEP 1 249 143 106 155  
SINCE JAN 1 1433 1159 274 1216    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 14 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 5.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 61 300 PM  
AVERAGE 81  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 89 1986  
MINIMUM TEMPERATURE (F) 49 32 1998  
1997  
 
 
SUNRISE AND SUNSET  
OCTOBER 1 2018.......SUNRISE 706 AM EDT SUNSET 652 PM EDT  
OCTOBER 2 2018.......SUNRISE 707 AM EDT SUNSET 651 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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