207  
CDUS41 KLWX 030540  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
140 AM EDT FRI MAY 3 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 2 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 87 129 PM 88 2018 72 15 88  
2010  
1992  
MINIMUM 54 513 AM 34 1979 47 7 46  
1960  
AVERAGE 71 59 12 67  
 
PRECIPITATION (IN)  
YESTERDAY 0.58 1.39 2016 0.12 0.46 0.00  
MONTH TO DATE 0.58 0.25 0.33 0.00  
SINCE MAR 1 7.95 7.10 0.85 5.34  
SINCE JAN 1 15.41 12.52 2.89 11.73  
 
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 0 7 -7 0  
MONTH TO DATE 2 14 -12 4  
SINCE MAR 1 884 996 -112 1193  
SINCE JUL 1 4389 4586 -197 4544  
 
COOLING  
YESTERDAY 6 1 5 2  
MONTH TO DATE 6 2 4 2  
SINCE MAR 1 28 22 6 17  
SINCE JAN 1 28 22 6 22    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 3.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
HEAVY RAIN  
LIGHT RAIN  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 400 AM  
LOWEST 54 1100 AM  
AVERAGE 77  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 72 92 1965  
MINIMUM TEMPERATURE (F) 47 32 2005  
1963  
 
 
SUNRISE AND SUNSET  
MAY 3 2019...........SUNRISE 610 AM EDT SUNSET 804 PM EDT  
MAY 4 2019...........SUNRISE 609 AM EDT SUNSET 805 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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