043  
CDUS41 KLWX 270528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
127 AM EDT FRI JUL 27 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 26 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 89 426 PM 98 2012 88 1 84  
1966  
MINIMUM 68 555 AM 50 1976 66 2 61  
AVERAGE 79 77 2 73  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.76 1989 0.12 -0.12 0.00  
MONTH TO DATE 9.69 3.06 6.63 7.11  
SINCE JUN 1 13.86 7.04 6.82 8.39  
SINCE JAN 1 34.51 23.86 10.65 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 14 12 2 8  
MONTH TO DATE 315 307 8 363  
SINCE JUN 1 556 544 12 619  
SINCE JAN 1 748 636 112 756    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION W (270)  
AVERAGE WIND SPEED 4.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 1200 AM  
LOWEST 46 400 PM  
AVERAGE 73  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 98 1993  
MINIMUM TEMPERATURE (F) 66 52 1977  
 
 
SUNRISE AND SUNSET  
JULY 27 2018..........SUNRISE 606 AM EDT SUNSET 826 PM EDT  
JULY 28 2018..........SUNRISE 607 AM EDT SUNSET 825 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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