287  
CDUS41 KLWX 202131  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
529 PM EDT SAT APR 20 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 20 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 72 235 PM 88 1985 68 4 60  
1976  
MINIMUM 64 552 AM 28 1974 43 21 29  
AVERAGE 68 56 12 45  
 
PRECIPITATION (IN)  
TODAY 0.01 2.90 2008 0.11 -0.10 0.00  
MONTH TO DATE 2.24 2.31 -0.07 1.63  
SINCE MAR 1 6.79 5.69 1.10 3.42  
SINCE JAN 1 14.25 11.11 3.14 9.81  
 
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 0 10 -10 20  
MONTH TO DATE 157 253 -96 307  
SINCE MAR 1 841 900 -59 1086  
SINCE JUL 1 4346 4490 -144 4437  
 
COOLING  
TODAY 3 1 2 0  
MONTH TO DATE 21 8 13 15  
SINCE MAR 1 21 11 10 15  
SINCE JAN 1 21 11 10 20    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION SW (210)  
AVERAGE WIND SPEED 15.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.9  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 300 AM  
LOWEST 37 400 PM  
AVERAGE 65  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 89 1985  
MINIMUM TEMPERATURE (F) 44 29 1983  
 
 
SUNRISE AND SUNSET  
APRIL 20 2019.........SUNRISE 627 AM EDT SUNSET 752 PM EDT  
APRIL 21 2019.........SUNRISE 625 AM EDT SUNSET 753 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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