789  
CDUS41 KLWX 222124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
523 PM EDT WED MAY 22 2019  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 22 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 71 359 PM 88 2004 77 -6 80  
1984  
1975  
MINIMUM 48 416 AM 31 2002 53 -5 65  
AVERAGE 60 65 -5 73  
 
PRECIPITATION (IN)  
TODAY 0.00 2.07 2001 0.15 -0.15 0.83  
MONTH TO DATE 4.04 3.18 0.86 6.50  
SINCE MAR 1 11.41 10.03 1.38 11.84  
SINCE JAN 1 18.87 15.45 3.42 18.23  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 5 3 2 0  
MONTH TO DATE 60 109 -49 21  
SINCE MAR 1 942 1091 -149 1210  
SINCE JUL 1 4447 4681 -234 4561  
 
COOLING  
TODAY 0 3 -3 8  
MONTH TO DATE 66 39 27 98  
SINCE MAR 1 88 59 29 113  
SINCE JAN 1 88 59 29 118    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION SE (130)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION S (200)  
AVERAGE WIND SPEED 4.6  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.8  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 400 AM  
LOWEST 37 1100 AM  
AVERAGE 62  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 77 92 1964  
MINIMUM TEMPERATURE (F) 53 39 2002  
1990  
1971  
 
 
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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