491  
CDUS41 KLWX 080523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT THU JUL 08 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 7 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 95 1:55 PM 101 1988 88 7 89  
2010  
2012  
MINIMUM 70 4:50 AM 47 1970 67 3 69  
AVERAGE 83 77 6 79  
 
PRECIPITATION (IN)  
YESTERDAY 0.02 1.59 2005 0.13 -0.11 0.62  
MONTH TO DATE 0.81 0.95 -0.14 1.30  
SINCE JUN 1 4.46 5.25 -0.79 6.51  
SINCE JAN 1 18.04 22.49 -4.45 23.03  
 
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 18 12 6 14  
MONTH TO DATE 80 82 -2 107  
SINCE JUN 1 374 320 54 380  
SINCE JAN 1 483 426 57 457    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 2.3  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 5:00 AM  
LOWEST 49 1:00 PM  
AVERAGE 70  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 101 2012  
MINIMUM TEMPERATURE (F) 67 48 1983  
1984  
 
SUNRISE AND SUNSET  
JULY 8 2021..........SUNRISE 5:52 AM EDT SUNSET 8:38 PM EDT  
JULY 9 2021..........SUNRISE 5:53 AM EDT SUNSET 8:37 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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