033  
CDUS41 KLWX 122125  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
525 PM EDT SUN MAY 12 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 12 2019
 
 
VALID TODAY AS OF 0500 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 58 617 AM 90 2018 74 -16 90  
MINIMUM 54 1102 AM 34 1969 50 4 61  
AVERAGE 56 62 -6 76  
 
PRECIPITATION (IN)  
TODAY 0.53 1.37 1974 0.15 0.38 T  
MONTH TO DATE 3.46 1.64 1.82 0.24  
SINCE MAR 1 10.83 8.49 2.34 5.58  
SINCE JAN 1 18.29 13.91 4.38 11.97  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 9 5 4 0  
MONTH TO DATE 19 71 -52 14  
SINCE MAR 1 901 1053 -152 1203  
SINCE JUL 1 4406 4643 -237 4554  
 
COOLING  
TODAY 0 2 -2 11  
MONTH TO DATE 31 15 16 44  
SINCE MAR 1 53 35 18 59  
SINCE JAN 1 53 35 18 64    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION E (70)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION E (70)  
AVERAGE WIND SPEED 8.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 200 AM  
LOWEST 86 1200 PM  
AVERAGE 93  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 74 92 2000  
MINIMUM TEMPERATURE (F) 50 32 1976  
 
 
SUNRISE AND SUNSET  
MAY 12 2019...........SUNRISE 600 AM EDT SUNSET 813 PM EDT  
MAY 13 2019...........SUNRISE 559 AM EDT SUNSET 814 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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