328  
CDUS41 KLWX 152124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
524 PM EDT FRI OCT 15 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 15 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 83 3:12 PM 88 1989 68 15 75  
MINIMUM 57 4:17 AM 28 1987 46 11 51  
AVERAGE 70 57 13 63  
 
PRECIPITATION (IN)  
TODAY 0.00 1.30 2014 0.12 -0.12 0.00  
MONTH TO DATE 0.03 1.81 -1.78 1.32  
SINCE SEP 1 4.75 5.75 -1.00 3.60  
SINCE JAN 1 29.34 34.97 -5.63 37.82  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE SEP 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  
TODAY 0 9 -9 2  
MONTH TO DATE 5 99 -94 84  
SINCE SEP 1 22 144 -122 145  
SINCE JUL 1 22 145 -123 145  
 
COOLING  
TODAY 5 0 5 0  
MONTH TO DATE 52 19 33 4  
SINCE SEP 1 223 171 52 139  
SINCE JAN 1 1475 1227 248 1391    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION S (160)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION S (170)  
AVERAGE WIND SPEED 2.2  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 5:00 AM  
LOWEST 58 1:00 PM  
AVERAGE 76  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 85 1989  
MINIMUM TEMPERATURE (F) 45 30 1986  
 
SUNRISE AND SUNSET  
OCTOBER 15 2021.......SUNRISE 7:20 AM EDT SUNSET 6:31 PM EDT  
OCTOBER 16 2021.......SUNRISE 7:21 AM EDT SUNSET 6:29 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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