739  
CDUS41 KLWX 040528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
128 AM EDT SAT MAY 4 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 3 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 83 248 PM 92 1965 72 11 90  
MINIMUM 58 357 AM 32 2005 47 11 63  
1963  
AVERAGE 71 60 11 77  
 
PRECIPITATION (IN)  
YESTERDAY 0.13 1.03 1984 0.14 -0.01 0.00  
MONTH TO DATE 0.71 0.39 0.32 0.00  
SINCE MAR 1 8.08 7.24 0.84 5.34  
SINCE JAN 1 15.54 12.66 2.88 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 21 -19 4  
SINCE MAR 1 884 1003 -119 1193  
SINCE JUL 1 4389 4593 -204 4544  
 
COOLING  
YESTERDAY 6 1 5 12  
MONTH TO DATE 12 3 9 14  
SINCE MAR 1 34 23 11 29  
SINCE JAN 1 34 23 11 34    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION N (350)  
AVERAGE WIND SPEED 5.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
THUNDERSTORM  
RAIN  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 400 AM  
LOWEST 58 200 PM  
AVERAGE 79  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 72 90 2018  
2001  
MINIMUM TEMPERATURE (F) 47 31 1967  
 
 
SUNRISE AND SUNSET  
MAY 4 2019...........SUNRISE 609 AM EDT SUNSET 805 PM EDT  
MAY 5 2019...........SUNRISE 607 AM EDT SUNSET 806 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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