145  
CDUS41 KLWX 090522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT TUE APR 9 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 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 82 148 PM 87 1991 64 18 51  
MINIMUM 60 610 AM 24 1970 40 20 29  
AVERAGE 71 52 19 40  
 
PRECIPITATION (IN)  
YESTERDAY 0.02 1.15 2000 0.12 -0.10 0.00  
MONTH TO DATE 0.38 0.96 -0.58 0.15  
SINCE MAR 1 4.93 4.34 0.59 1.94  
SINCE JAN 1 12.39 9.76 2.63 8.33  
 
SNOWFALL (IN)  
YESTERDAY 0.0 T 2000 0.1 -0.1  
1972  
MONTH TO DATE 0.0 0.2 -0.2  
SINCE JUL 1 26.5 21.9 4.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 13 -13 25  
MONTH TO DATE 114 116 -2 132  
SINCE MAR 1 798 763 35 911  
SINCE JUL 1 4303 4353 -50 4262  
 
COOLING  
YESTERDAY 6 0 6 0  
MONTH TO DATE 6 0 6 0  
SINCE MAR 1 6 3 3 0  
SINCE JAN 1 6 3 3 5    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 8.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 700 PM  
LOWEST 42 200 PM  
AVERAGE 68  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 65 89 2001  
MINIMUM TEMPERATURE (F) 40 23 1977  
 
 
SUNRISE AND SUNSET  
APRIL 9 2019.........SUNRISE 643 AM EDT SUNSET 741 PM EDT  
APRIL 10 2019.........SUNRISE 641 AM EDT SUNSET 742 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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