333  
CDUS41 KLWX 210526  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EDT MON OCT 21 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 20 2019
 
 
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)  
YESTERDAY  
MAXIMUM 57 324 PM 83 2016 67 -10 69  
1969  
MINIMUM 52 846 AM 20 1972 42 10 48  
AVERAGE 55 54 1 59  
 
PRECIPITATION (IN)  
YESTERDAY 1.44R 1.27 1976 0.10 1.34 0.03  
MONTH TO DATE 2.58 2.08 0.50 1.28  
SINCE SEP 1 2.99 6.00 -3.01 8.64  
SINCE JAN 1 32.83 34.00 -1.17 51.90  
 
SNOWFALL (IN)  
YESTERDAY 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  
YESTERDAY 10 11 -1 6  
MONTH TO DATE 110 161 -51 96  
SINCE SEP 1 115 217 -102 109  
SINCE JUL 1 115 219 -104 109  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 48 16 32 97  
SINCE SEP 1 286 157 129 338  
SINCE JAN 1 1521 1173 348 1522    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 8.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 700 AM  
LOWEST 72 100 AM  
AVERAGE 84  
   
......................................................
 
 
 
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 2019.......SUNRISE 725 AM EDT SUNSET 623 PM EDT  
OCTOBER 22 2019.......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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