845  
CDUS41 KLWX 152127  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
527 PM EDT SUN SEP 15 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 15 2019
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2019  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 87 334 PM 95 1998 80 7 81  
1993  
MINIMUM 68 537 AM 38 1985 57 11 69  
AVERAGE 78 68 10 75  
 
PRECIPITATION (IN)  
TODAY 0.00 1.06 1981 0.15 -0.15 T  
MONTH TO DATE 0.33 1.88 -1.55 2.74  
SINCE SEP 1 0.33 1.88 -1.55 2.74  
SINCE JAN 1 30.17 29.88 0.29 46.00  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 0 1 -1 0  
MONTH TO DATE 0 8 -8 4  
SINCE SEP 1 0 8 -8 4  
SINCE JUL 1 0 10 -10 4  
 
COOLING  
TODAY 13 5 8 10  
MONTH TO DATE 148 97 51 159  
SINCE SEP 1 148 97 51 159  
SINCE JAN 1 1383 1113 270 1343    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 16 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 5.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 100 AM  
LOWEST 32 100 PM  
AVERAGE 63  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 79 97 1991  
MINIMUM TEMPERATURE (F) 56 37 1984  
 
 
SUNRISE AND SUNSET  
SEPTEMBER 15 2019.....SUNRISE 651 AM EDT SUNSET 718 PM EDT  
SEPTEMBER 16 2019.....SUNRISE 652 AM EDT SUNSET 717 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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