508  
CDUS41 KLWX 040528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
128 AM EDT SUN JUL 04 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 3 2021
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 80 4:56 PM 103 1966 87 -7 94  
MINIMUM 61 5:27 AM 50 1962 66 -5 65  
1977  
AVERAGE 71 77 -6 80  
 
PRECIPITATION (IN)  
YESTERDAY T 1.66 1978 0.13 -0.13 0.00  
MONTH TO DATE 0.79 0.42 0.37 0.12  
SINCE JUN 1 4.44 4.72 -0.28 5.33  
SINCE JAN 1 18.02 21.96 -3.94 21.85  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE JUN 1 0.0 0.0 0.0 0.0  
SINCE JUL 1 0.0 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 6 13 -7 5  
SINCE JUL 1 0 0 0 0  
 
COOLING  
YESTERDAY 6 12 -6 15  
MONTH TO DATE 28 34 -6 41  
SINCE JUN 1 322 272 50 314  
SINCE JAN 1 431 378 53 391    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 9.5  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 87 11:00 PM  
LOWEST 44 5:00 PM  
AVERAGE 66  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 87 97 1999  
2002  
MINIMUM TEMPERATURE (F) 66 48 1986  
 
SUNRISE AND SUNSET  
JULY 4 2021..........SUNRISE 5:50 AM EDT SUNSET 8:39 PM EDT  
JULY 5 2021..........SUNRISE 5:50 AM EDT SUNSET 8:38 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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