066  
CDUS41 KLWX 120522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1221 AM EST SAT JAN 12 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 11 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 36 350 PM 71 1975 42 -6 62  
MINIMUM 24 941 PM -5 1988 24 0 37  
AVERAGE 30 33 -3 50  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.90 1991 0.09 -0.09 0.00  
MONTH TO DATE 0.25 0.90 -0.65 0.07  
SINCE DEC 1 6.01 3.86 2.15 0.84  
SINCE JAN 1 0.25 0.90 -0.65 0.07  
 
SNOWFALL (IN)  
YESTERDAY 0.0 2.2 1991 0.2 -0.2  
MONTH TO DATE T 2.0 -2.0  
SINCE JUL 1 3.0 6.0 -3.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 35 32 3 15  
MONTH TO DATE 272 352 -80 461  
SINCE DEC 1 1076 1234 -158 1384  
SINCE JUL 1 2034 2150 -116 2178  
 
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 24 HIGHEST WIND DIRECTION NW (330)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 10.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.3  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 68 800 AM  
LOWEST 35 300 PM  
AVERAGE 52  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 42 70 2018  
2017  
MINIMUM TEMPERATURE (F) 24 -4 1977  
 
 
SUNRISE AND SUNSET  
JANUARY 12 2019.......SUNRISE 728 AM EST SUNSET 508 PM EST  
JANUARY 13 2019.......SUNRISE 728 AM EST SUNSET 509 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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