370  
CDUS41 KLWX 230525  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1223 AM EST FRI FEB 23 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 22 2018
 
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 65 1258 AM 71 1991 48 17 65  
MINIMUM 41 1159 PM 4 1968 27 14 44  
AVERAGE 53 38 15 55  
 
PRECIPITATION (IN)  
YESTERDAY 0.09 1.69 2003 0.09 0.00 0.00  
MONTH TO DATE 3.96 2.16 1.80 0.25  
SINCE DEC 1 6.52 7.80 -1.28 5.34  
SINCE JAN 1 5.75 4.84 0.91 2.98  
 
SNOWFALL (IN)  
YESTERDAY 0.0 3.5 1986 0.3 -0.3  
MONTH TO DATE 1.6 6.4 -4.8  
SINCE JUL 1 6.6 17.7 -11.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 12 27 -15 10  
MONTH TO DATE 518 648 -130 484  
SINCE DEC 1 2444 2516 -72 2093  
SINCE JUL 1 3238 3432 -194 2820  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 5 0 5 0  
SINCE DEC 1 5 0 5 0  
SINCE JAN 1 5 0 5 0    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION N (360)  
AVERAGE WIND SPEED 9.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 1.0  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 500 PM  
LOWEST 61 1100 AM  
AVERAGE 81  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 48 77 2017  
MINIMUM TEMPERATURE (F) 27 5 1963  
 
 
SUNRISE AND SUNSET  
FEBRUARY 23 2018......SUNRISE 651 AM EST SUNSET 556 PM EST  
FEBRUARY 24 2018......SUNRISE 649 AM EST SUNSET 557 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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