663  
CDUS41 KLWX 080529  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
128 AM EDT SUN JUL 8 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 7 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 80 333 PM 101 2012 88 -8 88  
2010  
1988  
MINIMUM 63 1159 PM 47 1970 65 -2 67  
AVERAGE 72 77 -5 78  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.59 2005 0.11 -0.11 0.10  
MONTH TO DATE 0.85 0.84 0.01 3.15  
SINCE JUN 1 5.02 4.82 0.20 4.43  
SINCE JAN 1 25.67 21.64 4.03 23.52  
 
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 7 12 -5 13  
MONTH TO DATE 110 79 31 95  
SINCE JUN 1 351 316 35 351  
SINCE JAN 1 543 408 135 488    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (20)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION NE (30)  
AVERAGE WIND SPEED 8.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 70 200 AM  
LOWEST 40 600 PM  
AVERAGE 55  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 101 2012  
MINIMUM TEMPERATURE (F) 65 48 1984  
1983  
 
 
SUNRISE AND SUNSET  
JULY 8 2018..........SUNRISE 552 AM EDT SUNSET 838 PM EDT  
JULY 9 2018..........SUNRISE 553 AM EDT SUNSET 837 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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