101  
CDUS41 KLWX 232131  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
529 PM EDT MON APR 23 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 23 2018
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 69 253 PM 88 2001 69 0 60  
MINIMUM 42 504 AM 30 1989 44 -2 45  
AVERAGE 56 57 -1 53  
 
PRECIPITATION (IN)  
TODAY 0.00 0.67 1963 0.11 -0.11 0.00  
MONTH TO DATE 1.63 2.65 -1.02 2.60  
SINCE MAR 1 3.42 6.03 -2.61 6.72  
SINCE JAN 1 9.81 11.45 -1.64 10.16  
 
SNOWFALL (IN)  
TODAY 0.0 T 1986 0.0 0.0  
MONTH TO DATE T 0.3 -0.3  
SINCE JUL 1 11.9 22.0 -10.1  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 9 9 0 12  
MONTH TO DATE 343 281 62 158  
SINCE MAR 1 1122 928 194 798  
SINCE JUL 1 4473 4518 -45 3691  
 
COOLING  
TODAY 0 1 -1 0  
MONTH TO DATE 15 11 4 35  
SINCE MAR 1 15 14 1 37  
SINCE JAN 1 20 14 6 37    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 23 HIGHEST GUST DIRECTION S (160)  
AVERAGE WIND SPEED 6.3  
 
 
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 83 400 AM  
LOWEST 37 300 PM  
AVERAGE 60  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 70 85 2011  
1994  
1990  
MINIMUM TEMPERATURE (F) 45 30 1989  
 
 
SUNRISE AND SUNSET  
APRIL 23 2018.........SUNRISE 622 AM EDT SUNSET 755 PM EDT  
APRIL 24 2018.........SUNRISE 621 AM EDT SUNSET 756 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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