471  
CDUS41 KLWX 220538  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
136 AM EDT WED MAY 22 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 21 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 71 416 PM 92 1996 76 -5 82  
MINIMUM 53 1159 PM 33 1992 53 0 63  
AVERAGE 62 64 -2 73  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.06 2003 0.16 -0.16 0.00  
MONTH TO DATE 4.04 3.03 1.01 5.67  
SINCE MAR 1 11.41 9.88 1.53 11.01  
SINCE JAN 1 18.87 15.30 3.57 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 3 3 0 0  
MONTH TO DATE 55 106 -51 21  
SINCE MAR 1 937 1088 -151 1210  
SINCE JUL 1 4442 4678 -236 4561  
 
COOLING  
YESTERDAY 0 3 -3 8  
MONTH TO DATE 66 36 30 90  
SINCE MAR 1 88 56 32 105  
SINCE JAN 1 88 56 32 110    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 27 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 10.1  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.5  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 64 400 AM  
LOWEST 31 300 PM  
AVERAGE 48  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 88 2004  
1984  
1975  
MINIMUM TEMPERATURE (F) 53 31 2002  
 
 
SUNRISE AND SUNSET  
MAY 22 2019...........SUNRISE 552 AM EDT SUNSET 822 PM EDT  
MAY 23 2019...........SUNRISE 551 AM EDT SUNSET 822 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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