584  
CDUS41 KLWX 190523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
122 AM EDT SUN MAY 19 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 18 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 85 356 PM 91 1987 76 9 68  
MINIMUM 61 305 AM 33 1973 52 9 55  
AVERAGE 73 64 9 62  
 
PRECIPITATION (IN)  
YESTERDAY 0.03 3.13 1988 0.15 -0.12 0.85  
MONTH TO DATE 4.04 2.57 1.47 4.96  
SINCE MAR 1 11.41 9.42 1.99 10.30  
SINCE JAN 1 18.87 14.84 4.03 16.69  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0  
SINCE JUL 1 26.5 22.0 4.5  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 4 -4 3  
MONTH TO DATE 52 96 -44 17  
SINCE MAR 1 934 1078 -144 1206  
SINCE JUL 1 4439 4668 -229 4557  
 
COOLING  
YESTERDAY 8 2 6 0  
MONTH TO DATE 41 27 14 70  
SINCE MAR 1 63 47 16 85  
SINCE JAN 1 63 47 16 90    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 16 HIGHEST WIND DIRECTION S (160)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION S (160)  
AVERAGE WIND SPEED 3.9  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 100 AM  
LOWEST 51 300 PM  
AVERAGE 72  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 76 92 1997  
1996  
MINIMUM TEMPERATURE (F) 52 36 2002  
 
 
SUNRISE AND SUNSET  
MAY 19 2019...........SUNRISE 554 AM EDT SUNSET 819 PM EDT  
MAY 20 2019...........SUNRISE 553 AM EDT SUNSET 820 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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