523  
CDUS41 KLWX 150527  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1227 AM EST TUE JAN 15 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 14 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 34 411 PM 72 1995 42 -8 26  
MINIMUM 15 1139 PM 5 1970 24 -9 14  
AVERAGE 25 33 -8 20  
 
PRECIPITATION (IN)  
YESTERDAY T 1.79 2005 0.09 -0.09 0.00  
MONTH TO DATE 1.13 1.16 -0.03 1.53  
SINCE DEC 1 6.89 4.12 2.77 2.30  
SINCE JAN 1 1.13 1.16 -0.03 1.53  
 
SNOWFALL (IN)  
YESTERDAY T 0.3 1978 0.2 -0.2  
MONTH TO DATE 10.6 2.7 7.9  
SINCE JUL 1 13.6 6.7 6.9  
SNOW DEPTH 8  
 
DEGREE DAYS  
HEATING  
YESTERDAY 40 32 8 45  
MONTH TO DATE 384 448 -64 532  
SINCE DEC 1 1188 1330 -142 1455  
SINCE JUL 1 2146 2246 -100 2249  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION N (10)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION N (10)  
AVERAGE WIND SPEED 5.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT SNOW  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 900 PM  
LOWEST 49 100 PM  
AVERAGE 75  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 68 2007  
MINIMUM TEMPERATURE (F) 24 -7 1964  
 
 
SUNRISE AND SUNSET  
JANUARY 15 2019.......SUNRISE 727 AM EST SUNSET 512 PM EST  
JANUARY 16 2019.......SUNRISE 727 AM EST SUNSET 513 PM EST  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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