038  
CDUS41 KLWX 200528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
127 AM EDT MON MAY 20 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 19 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 89 433 PM 92 1997 76 13 67  
1996  
MINIMUM 62 505 AM 36 2002 52 10 54  
AVERAGE 76 64 12 61  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.18 1988 0.15 -0.15 0.71  
MONTH TO DATE 4.04 2.72 1.32 5.67  
SINCE MAR 1 11.41 9.57 1.84 11.01  
SINCE JAN 1 18.87 14.99 3.88 17.40  
 
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 4  
MONTH TO DATE 52 100 -48 21  
SINCE MAR 1 934 1082 -148 1210  
SINCE JUL 1 4439 4672 -233 4561  
 
COOLING  
YESTERDAY 11 3 8 0  
MONTH TO DATE 52 30 22 70  
SINCE MAR 1 74 50 24 85  
SINCE JAN 1 74 50 24 90    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION S (180)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION S (190)  
AVERAGE WIND SPEED 8.3  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.6  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 500 AM  
LOWEST 46 500 PM  
AVERAGE 70  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 76 93 1996  
MINIMUM TEMPERATURE (F) 52 36 2002  
 
 
SUNRISE AND SUNSET  
MAY 20 2019...........SUNRISE 553 AM EDT SUNSET 820 PM EDT  
MAY 21 2019...........SUNRISE 553 AM EDT SUNSET 821 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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