677  
CDUS41 KLWX 150529  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
127 AM EDT WED MAY 15 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 14 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 61 131 PM 89 2010 75 -14 81  
MINIMUM 47 1136 PM 32 2013 51 -4 60  
1996  
AVERAGE 54 62 -8 71  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.87 2018 0.16 -0.16 1.87  
MONTH TO DATE 4.00 1.95 2.05 2.63  
SINCE MAR 1 11.37 8.80 2.57 7.97  
SINCE JAN 1 18.83 14.22 4.61 14.36  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0  
SINCE JUL 1 26.5 22.0 4.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 11 4 7 0  
MONTH TO DATE 44 80 -36 14  
SINCE MAR 1 926 1062 -136 1203  
SINCE JUL 1 4431 4652 -221 4554  
 
COOLING  
YESTERDAY 0 2 -2 6  
MONTH TO DATE 31 19 12 52  
SINCE MAR 1 53 39 14 67  
SINCE JAN 1 53 39 14 72    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 31 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 11.2  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 600 AM  
LOWEST 46 100 PM  
AVERAGE 70  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 75 90 1962  
MINIMUM TEMPERATURE (F) 51 37 2016  
1984  
 
 
SUNRISE AND SUNSET  
MAY 15 2019...........SUNRISE 557 AM EDT SUNSET 815 PM EDT  
MAY 16 2019...........SUNRISE 556 AM EDT SUNSET 816 PM EDT  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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