447  
CDUS41 KLWX 070529  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
129 AM EDT SAT JUL 7 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 6 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 85 540 PM 102 1977 88 -3 80  
MINIMUM 73 1159 PM 45 1979 65 8 71  
AVERAGE 79 76 3 76  
 
PRECIPITATION (IN)  
YESTERDAY T 1.68 2017 0.12 -0.12 1.68  
MONTH TO DATE 0.85 0.73 0.12 3.05  
SINCE JUN 1 5.02 4.71 0.31 4.33  
SINCE JAN 1 25.67 21.53 4.14 23.42  
 
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 11  
MONTH TO DATE 103 67 36 82  
SINCE JUN 1 344 304 40 338  
SINCE JAN 1 536 396 140 475    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 7.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 94 400 AM  
LOWEST 54 800 PM  
AVERAGE 74  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 101 2012  
2010  
1988  
MINIMUM TEMPERATURE (F) 65 47 1970  
 
 
SUNRISE AND SUNSET  
JULY 7 2018..........SUNRISE 551 AM EDT SUNSET 838 PM EDT  
JULY 8 2018..........SUNRISE 552 AM EDT SUNSET 838 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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