323  
CDUS41 KLWX 250537  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
135 AM EDT WED JUL 25 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 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 82 228 PM 99 2010 88 -6 90  
MINIMUM 73 629 AM 48 1985 66 7 73  
AVERAGE 78 77 1 82  
 
PRECIPITATION (IN)  
YESTERDAY 0.77 0.78 1992 0.12 0.65 T  
MONTH TO DATE 8.33 2.82 5.51 7.11  
SINCE JUN 1 12.50 6.80 5.70 8.39  
SINCE JAN 1 33.15 23.62 9.53 27.48  
 
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 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE JUN 1 5 15 -10 6  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 13 12 1 17  
MONTH TO DATE 289 283 6 349  
SINCE JUN 1 530 520 10 605  
SINCE JAN 1 722 612 110 742    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 8.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 300 AM  
LOWEST 79 200 PM  
AVERAGE 90  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 100 2016  
MINIMUM TEMPERATURE (F) 66 55 1976  
 
 
SUNRISE AND SUNSET  
JULY 25 2018..........SUNRISE 605 AM EDT SUNSET 828 PM EDT  
JULY 26 2018..........SUNRISE 605 AM EDT SUNSET 827 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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