274  
CDUS41 KLWX 182125  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
524 PM EDT THU APR 18 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 18 2019
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 80 359 PM 90 1976 68 12 62  
MINIMUM 53 537 AM 29 2018 43 10 29  
AVERAGE 67 55 12 46  
 
PRECIPITATION (IN)  
TODAY 0.00 0.59 1978 0.10 -0.10 0.00  
MONTH TO DATE 0.97 2.09 -1.12 1.62  
SINCE MAR 1 5.52 5.47 0.05 3.41  
SINCE JAN 1 12.98 10.89 2.09 9.80  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 0 10 -10 19  
MONTH TO DATE 157 233 -76 270  
SINCE MAR 1 841 880 -39 1049  
SINCE JUL 1 4346 4470 -124 4400  
 
COOLING  
TODAY 2 1 1 0  
MONTH TO DATE 14 6 8 15  
SINCE MAR 1 14 9 5 15  
SINCE JAN 1 14 9 5 20    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (200)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 6.4  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 800 AM  
LOWEST 39 400 PM  
AVERAGE 63  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 91 2002  
MINIMUM TEMPERATURE (F) 43 27 2001  
1990  
 
 
SUNRISE AND SUNSET  
APRIL 18 2019.........SUNRISE 629 AM EDT SUNSET 750 PM EDT  
APRIL 19 2019.........SUNRISE 628 AM EDT SUNSET 751 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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