026  
CDUS41 KLWX 090527  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
126 AM EDT THU MAY 9 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 8 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 68 1209 AM 90 2000 73 -5 76  
MINIMUM 60 355 AM 29 1974 49 11 50  
AVERAGE 64 61 3 63  
 
PRECIPITATION (IN)  
YESTERDAY T 2.10 1960 0.13 -0.13 0.00  
MONTH TO DATE 2.20 1.06 1.14 0.24  
SINCE MAR 1 9.57 7.91 1.66 5.58  
SINCE JAN 1 17.03 13.33 3.70 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 1 6 -5 2  
MONTH TO DATE 6 51 -45 11  
SINCE MAR 1 888 1033 -145 1200  
SINCE JUL 1 4393 4623 -230 4551  
 
COOLING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 21 8 13 26  
SINCE MAR 1 43 28 15 41  
SINCE JAN 1 43 28 15 46    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (80)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION E (90)  
AVERAGE WIND SPEED 7.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
FOG  
HAZE  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 90 400 AM  
LOWEST 73 1200 AM  
AVERAGE 82  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 73 91 1963  
MINIMUM TEMPERATURE (F) 49 30 1976  
 
 
SUNRISE AND SUNSET  
MAY 9 2019...........SUNRISE 603 AM EDT SUNSET 810 PM EDT  
MAY 10 2019...........SUNRISE 602 AM EDT SUNSET 811 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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