948  
CDUS41 KLWX 150524  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
124 AM EDT THU JUL 15 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JULY 14 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 90 2:21 PM 98 1993 88 2 89  
MINIMUM 71 11:18 PM 53 2009 67 4 65  
AVERAGE 81 77 4 77  
 
PRECIPITATION (IN)  
YESTERDAY T 1.56 2002 0.14 -0.14 0.00  
MONTH TO DATE 2.24 1.90 0.34 1.56  
SINCE JUN 1 5.89 6.20 -0.31 6.77  
SINCE JAN 1 19.47 23.44 -3.97 23.29  
 
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 16 12 4 12  
MONTH TO DATE 190 166 24 208  
SINCE JUN 1 484 404 80 481  
SINCE JAN 1 593 510 83 558    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (180)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 4.4  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 11:00 PM  
LOWEST 47 10:00 AM  
AVERAGE 69  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 88 98 1995  
MINIMUM TEMPERATURE (F) 67 53 1981  
1987  
 
SUNRISE AND SUNSET  
JULY 15 2021..........SUNRISE 5:57 AM EDT SUNSET 8:34 PM EDT  
JULY 16 2021..........SUNRISE 5:58 AM EDT SUNSET 8:34 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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