138  
CDUS41 KLWX 282125  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
423 PM EST MON JAN 28 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 28 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 38 338 PM 68 2002 43 -5 55  
MINIMUM 27 911 AM -17 1987 24 3 45  
AVERAGE 33 34 -1 50  
 
PRECIPITATION (IN)  
TODAY 0.00 1.64 1998 0.10 -0.10 0.11  
MONTH TO DATE 3.69 2.40 1.29 1.79  
SINCE DEC 1 9.45 5.36 4.09 2.56  
SINCE JAN 1 3.69 2.40 1.29 1.79  
 
SNOWFALL (IN)  
TODAY 0.0 6.7 1994 0.3 -0.3  
MONTH TO DATE 12.4 6.4 6.0  
SINCE JUL 1 15.4 10.4 5.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 32 31 1 15  
MONTH TO DATE 865 894 -29 903  
SINCE DEC 1 1669 1776 -107 1826  
SINCE JUL 1 2627 2692 -65 2620  
 
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 NE (30)  
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 8.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 53 300 AM  
LOWEST 29 300 PM  
AVERAGE 41  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 75 1975  
MINIMUM TEMPERATURE (F) 24 -1 1987  
1963  
 
 
SUNRISE AND SUNSET  
JANUARY 28 2019.......SUNRISE 720 AM EST SUNSET 526 PM EST  
JANUARY 29 2019.......SUNRISE 719 AM EST SUNSET 527 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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