058  
CDUS41 KLWX 260526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
125 AM EDT WED JUL 26 2017  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 25 2017
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2017  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 79 432 PM 100 2016 88 -9 100  
MINIMUM 63 1159 PM 55 1976 66 -3 74  
AVERAGE 71 77 -6 87  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.54 1992 0.12 -0.12 0.01  
MONTH TO DATE 7.11 2.94 4.17 1.37  
SINCE JUN 1 8.39 6.92 1.47 7.72  
SINCE JAN 1 27.48 23.74 3.74 25.39  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0  
MONTH TO DATE T 0.0 0.0  
SINCE JUL 1 T 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 6 15 -9 3  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 6 12 -6 22  
MONTH TO DATE 355 295 60 353  
SINCE JUN 1 611 532 79 606  
SINCE JAN 1 748 624 124 704    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 9.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 81 1100 PM  
LOWEST 50 600 PM  
AVERAGE 66  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 98 2012  
1966  
MINIMUM TEMPERATURE (F) 66 50 1976  
 
 
SUNRISE AND SUNSET  
JULY 26 2017..........SUNRISE 606 AM EDT SUNSET 826 PM EDT  
JULY 27 2017..........SUNRISE 607 AM EDT SUNSET 826 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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