557  
CDUS41 KLWX 080523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1223 AM EST TUE JAN 8 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 7 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 39 1207 AM 71 2008 42 -3 24  
MINIMUM 30 420 AM -1 2018 24 6 -1  
AVERAGE 35 33 2 12  
 
PRECIPITATION (IN)  
YESTERDAY T 1.56 1996 0.09 -0.09 0.00  
MONTH TO DATE 0.14 0.57 -0.43 0.02  
SINCE DEC 1 5.90 3.53 2.37 0.79  
SINCE JAN 1 0.14 0.57 -0.43 0.02  
 
SNOWFALL (IN)  
YESTERDAY 0.0 19.8 1996 0.2 -0.2  
MONTH TO DATE 0.0 1.2 -1.2  
SINCE JUL 1 3.0 5.2 -2.2  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 30 32 -2 53  
MONTH TO DATE 162 224 -62 345  
SINCE DEC 1 966 1106 -140 1268  
SINCE JUL 1 1924 2022 -98 2062  
 
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 16 HIGHEST WIND DIRECTION S (160)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (160)  
AVERAGE WIND SPEED 6.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 76 1100 PM  
LOWEST 48 200 PM  
AVERAGE 62  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 70 2008  
MINIMUM TEMPERATURE (F) 24 -4 1970  
 
 
SUNRISE AND SUNSET  
JANUARY 8 2019.......SUNRISE 729 AM EST SUNSET 504 PM EST  
JANUARY 9 2019.......SUNRISE 729 AM EST SUNSET 505 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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