177  
CDUS41 KLWX 090522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT FRI JUL 09 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 8 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 87 12:57 PM 101 2012 88 -1 91  
MINIMUM 70 10:59 PM 48 1983 67 3 73  
1984  
AVERAGE 79 77 2 82  
 
PRECIPITATION (IN)  
YESTERDAY 0.79 1.96 2005 0.14 0.65 0.00  
MONTH TO DATE 1.60 1.09 0.51 1.30  
SINCE JUN 1 5.25 5.39 -0.14 6.51  
SINCE JAN 1 18.83 22.63 -3.80 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 14 12 2 17  
MONTH TO DATE 94 94 0 124  
SINCE JUN 1 388 332 56 397  
SINCE JAN 1 497 438 59 474    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 5.5  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 11:00 PM  
LOWEST 61 1:00 PM  
AVERAGE 77  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 99 1988  
1993  
MINIMUM TEMPERATURE (F) 67 48 1984  
 
SUNRISE AND SUNSET  
JULY 9 2021..........SUNRISE 5:53 AM EDT SUNSET 8:37 PM EDT  
JULY 10 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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