602  
CDUS41 KLWX 300534  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1232 AM EST WED JAN 30 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 29 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 36 124 PM 75 1975 43 -7 46  
MINIMUM 22 1159 PM -1 1987 24 -2 33  
1963  
AVERAGE 29 34 -5 40  
 
PRECIPITATION (IN)  
YESTERDAY 0.24 0.95 1990 0.09 0.15 0.00  
MONTH TO DATE 3.93 2.49 1.44 1.79  
SINCE DEC 1 9.69 5.45 4.24 2.56  
SINCE JAN 1 3.93 2.49 1.44 1.79  
 
SNOWFALL (IN)  
YESTERDAY 3.0 7.2 1966 0.3 2.7  
MONTH TO DATE 15.4 6.7 8.7  
SINCE JUL 1 18.4 10.7 7.7  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 36 31 5 25  
MONTH TO DATE 901 925 -24 928  
SINCE DEC 1 1705 1807 -102 1851  
SINCE JUL 1 2663 2723 -60 2645  
 
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 (320)  
HIGHEST GUST SPEED 34 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 7.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY SNOW  
SNOW  
LIGHT SNOW  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
HAZE  
BLOWING SNOW  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 400 PM  
LOWEST 53 100 AM  
AVERAGE 77  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 72 2013  
MINIMUM TEMPERATURE (F) 24 2 1965  
 
 
SUNRISE AND SUNSET  
JANUARY 30 2019.......SUNRISE 718 AM EST SUNSET 529 PM EST  
JANUARY 31 2019.......SUNRISE 717 AM EST SUNSET 530 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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