005  
CDUS41 KLWX 250528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
127 AM EDT TUE SEP 25 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 24 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 65 123 PM 97 2010 76 -11 89  
MINIMUM 61 602 AM 30 1974 53 8 60  
AVERAGE 63 64 -1 75  
 
PRECIPITATION (IN)  
YESTERDAY 0.16 2.17 2001 0.13 0.03 0.00  
MONTH TO DATE 4.73 3.13 1.60 1.75  
SINCE SEP 1 4.73 3.13 1.60 1.75  
SINCE JAN 1 47.99 31.13 16.86 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 2 3 -1 0  
MONTH TO DATE 11 30 -19 30  
SINCE SEP 1 11 30 -19 30  
SINCE JUL 1 11 32 -21 31  
 
COOLING  
YESTERDAY 0 3 -3 10  
MONTH TO DATE 219 129 90 112  
SINCE SEP 1 219 129 90 112  
SINCE JAN 1 1403 1145 258 1173    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (100)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION E (100)  
AVERAGE WIND SPEED 8.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 100 AM  
LOWEST 93 1000 AM  
AVERAGE 97  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 76 93 2010  
MINIMUM TEMPERATURE (F) 52 33 1983  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 25 2018.....SUNRISE 700 AM EDT SUNSET 702 PM EDT  
SEPTEMBER 26 2018.....SUNRISE 701 AM EDT SUNSET 700 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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