223  
CDUS41 KLWX 210527  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
127 AM EDT SUN OCT 21 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 20 2018
 
 
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)  
YESTERDAY  
MAXIMUM 69 224 PM 83 2016 67 2 76  
1969  
MINIMUM 48 1159 PM 20 1972 42 6 44  
AVERAGE 59 54 5 60  
 
PRECIPITATION (IN)  
YESTERDAY 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)  
YESTERDAY MM T 1974 0.0 MM  
MONTH TO DATE 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 6 11 -5 5  
MONTH TO DATE 96 161 -65 80  
SINCE SEP 1 109 217 -108 120  
SINCE JUL 1 109 219 -110 121  
 
COOLING  
YESTERDAY 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 38 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 47 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 7.4  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 600 AM  
LOWEST 45 300 PM  
AVERAGE 73  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 86 1979  
MINIMUM TEMPERATURE (F) 42 22 1972  
 
 
SUNRISE AND SUNSET  
OCTOBER 21 2018.......SUNRISE 725 AM EDT SUNSET 623 PM EDT  
OCTOBER 22 2018.......SUNRISE 726 AM EDT SUNSET 622 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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