561  
CDUS41 KLWX 272121  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
421 PM EST SUN JAN 27 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 27 2019
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 47 339 PM 71 1974 43 4 61  
MINIMUM 20 247 AM -9 1987 24 -4 26  
AVERAGE 34 34 0 44  
 
PRECIPITATION (IN)  
TODAY 0.00 0.95 1976 0.08 -0.08 0.00  
MONTH TO DATE 3.69 2.30 1.39 1.68  
SINCE DEC 1 9.45 5.26 4.19 2.45  
SINCE JAN 1 3.69 2.30 1.39 1.68  
 
SNOWFALL (IN)  
TODAY 0.0 2.0 2009 0.3 -0.3  
MONTH TO DATE 12.4 6.1 6.3  
SINCE JUL 1 15.4 10.1 5.3  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 31 31 0 21  
MONTH TO DATE 833 863 -30 888  
SINCE DEC 1 1637 1745 -108 1811  
SINCE JUL 1 2595 2661 -66 2605  
 
COOLING  
TODAY 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 15 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 6.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 100 AM  
LOWEST 45 200 PM  
AVERAGE 69  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 68 2002  
MINIMUM TEMPERATURE (F) 24 -17 1987  
 
 
SUNRISE AND SUNSET  
JANUARY 27 2019.......SUNRISE 720 AM EST SUNSET 525 PM EST  
JANUARY 28 2019.......SUNRISE 720 AM EST SUNSET 526 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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