030  
CDUS41 KLWX 040522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT WED JUL 4 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 3 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 96 329 PM 103 1966 88 8 90  
MINIMUM 73 358 AM 50 1977 65 8 66  
1962  
AVERAGE 85 76 9 78  
 
PRECIPITATION (IN)  
YESTERDAY 0.85 1.66 1978 0.12 0.73 0.00  
MONTH TO DATE 0.85 0.37 0.48 0.21  
SINCE JUN 1 5.02 4.35 0.67 1.49  
SINCE JAN 1 25.67 21.17 4.50 20.58  
 
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 20 11 9 13  
MONTH TO DATE 54 33 21 45  
SINCE JUN 1 295 270 25 301  
SINCE JAN 1 487 362 125 438    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 30 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 42 HIGHEST GUST DIRECTION S (160)  
AVERAGE WIND SPEED 4.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
HEAVY RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 400 AM  
LOWEST 49 300 PM  
AVERAGE 71  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 97 2002  
1999  
MINIMUM TEMPERATURE (F) 65 48 1986  
 
 
SUNRISE AND SUNSET  
JULY 4 2018..........SUNRISE 550 AM EDT SUNSET 839 PM EDT  
JULY 5 2018..........SUNRISE 550 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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