610  
CDUS41 KLWX 202128  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
525 PM EDT SAT OCT 20 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 20 2018
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 69 224 PM 83 2016 67 2 76  
1969  
MINIMUM 53 650 AM 20 1972 42 11 44  
AVERAGE 61 54 7 60  
 
PRECIPITATION (IN)  
TODAY 0.03 1.27 1976 0.10 -0.07 0.00  
MONTH TO DATE 1.28 2.08 -0.80 1.48  
SINCE SEP 1 8.64 6.00 2.64 3.23  
SINCE JAN 1 51.90 34.00 17.90 36.23  
 
SNOWFALL (IN)  
TODAY 0.0 T 1974 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 4 11 -7 5  
MONTH TO DATE 94 161 -67 80  
SINCE SEP 1 107 217 -110 120  
SINCE JUL 1 107 219 -112 121  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 97 16 81 64  
SINCE SEP 1 338 157 181 219  
SINCE JAN 1 1522 1173 349 1280    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 5.8  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 600 AM  
LOWEST 45 300 PM  
AVERAGE 73  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 86 1979  
MINIMUM TEMPERATURE (F) 42 22 1972  
 
 
SUNRISE AND SUNSET  
OCTOBER 20 2018.......SUNRISE 724 AM EDT SUNSET 624 PM EDT  
OCTOBER 21 2018.......SUNRISE 725 AM EDT SUNSET 623 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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