100  
CDUS41 KLWX 080536  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
134 AM EDT WED MAY 8 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 7 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 81 215 PM 90 2000 73 8 77  
1986  
MINIMUM 56 504 AM 28 1970 48 8 53  
AVERAGE 69 61 8 65  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.51 1967 0.14 -0.14 0.00  
MONTH TO DATE 2.20 0.93 1.27 0.24  
SINCE MAR 1 9.57 7.78 1.79 5.58  
SINCE JAN 1 17.03 13.20 3.83 11.97  
 
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 6 -6 0  
MONTH TO DATE 5 45 -40 9  
SINCE MAR 1 887 1027 -140 1198  
SINCE JUL 1 4392 4617 -225 4549  
 
COOLING  
YESTERDAY 4 1 3 0  
MONTH TO DATE 21 7 14 26  
SINCE MAR 1 43 27 16 41  
SINCE JAN 1 43 27 16 46    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 6.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.4  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 100 AM  
LOWEST 42 200 PM  
AVERAGE 68  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 90 2000  
MINIMUM TEMPERATURE (F) 49 29 1974  
 
 
SUNRISE AND SUNSET  
MAY 8 2019...........SUNRISE 604 AM EDT SUNSET 809 PM EDT  
MAY 9 2019...........SUNRISE 603 AM EDT SUNSET 810 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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