247  
CDUS41 KLWX 010529  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
129 AM EDT WED MAY 1 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 30 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 83 449 PM 86 2017 71 12 71  
2007  
1974  
MINIMUM 53 554 AM 29 1977 46 7 31  
AVERAGE 68 59 9 51  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 3.99 2014 0.11 -0.11 0.00  
MONTH TO DATE 2.82 3.47 -0.65 3.55  
SINCE MAR 1 7.37 6.85 0.52 5.34  
SINCE JAN 1 14.83 12.27 2.56 11.73  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0 2002 0.0 0.0  
2001  
MONTH TO DATE 0.0 0.3 -0.3  
SINCE JUL 1 26.5 22.0 4.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 7 -7 14  
MONTH TO DATE 198 337 -139 410  
SINCE MAR 1 882 982 -100 1189  
SINCE JUL 1 4387 4572 -185 4540  
 
COOLING  
YESTERDAY 3 1 2 0  
MONTH TO DATE 22 17 5 15  
SINCE MAR 1 22 20 2 15  
SINCE JAN 1 22 20 2 20    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION SE (120)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 4.7  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 400 AM  
LOWEST 43 500 PM  
AVERAGE 68  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 71 90 2010  
MINIMUM TEMPERATURE (F) 47 33 1996  
 
 
SUNRISE AND SUNSET  
MAY 1 2019...........SUNRISE 612 AM EDT SUNSET 802 PM EDT  
MAY 2 2019...........SUNRISE 611 AM EDT SUNSET 803 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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