366  
CDUS41 KLWX 172124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
524 PM EDT WED APR 17 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 17 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 73 202 PM 93 2002 67 6 45  
MINIMUM 54 640 AM 27 1983 43 11 36  
AVERAGE 64 55 9 41  
 
PRECIPITATION (IN)  
TODAY 0.00 1.44 2000 0.11 -0.11 0.00  
MONTH TO DATE 0.97 1.99 -1.02 1.62  
SINCE MAR 1 5.52 5.37 0.15 3.41  
SINCE JAN 1 12.98 10.79 2.19 9.80  
 
SNOWFALL (IN)  
TODAY 0.0 T 1983 0.0 0.0  
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 1 11 -10 24  
MONTH TO DATE 157 223 -66 251  
SINCE MAR 1 841 870 -29 1030  
SINCE JUL 1 4346 4460 -114 4381  
 
COOLING  
TODAY 0 1 -1 0  
MONTH TO DATE 12 5 7 15  
SINCE MAR 1 12 8 4 15  
SINCE JAN 1 12 8 4 20    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION E (100)  
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION E (90)  
AVERAGE WIND SPEED 6.5  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.7  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 59 600 AM  
LOWEST 38 100 PM  
AVERAGE 49  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 90 1976  
MINIMUM TEMPERATURE (F) 43 29 2018  
 
 
SUNRISE AND SUNSET  
APRIL 17 2019.........SUNRISE 631 AM EDT SUNSET 749 PM EDT  
APRIL 18 2019.........SUNRISE 629 AM EDT SUNSET 750 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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