228  
CDUS41 KLWX 192122  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
522 PM EDT WED MAY 19 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MAY 19 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1960 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 85 3:27 PM 92 1996 76 9 69  
1997  
MINIMUM 50 3:38 AM 36 2002 54 -4 55  
AVERAGE 68 65 3 62  
 
PRECIPITATION (IN)  
TODAY 0.00 1.18 1988 0.15 -0.15 0.00  
MONTH TO DATE 1.03 2.83 -1.80 1.62  
SINCE MAR 1 5.58 9.80 -4.22 9.17  
SINCE JAN 1 11.74 15.35 -3.61 15.74  
 
SNOWFALL (IN)  
TODAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE MAR 1 T 4.0 -4.0 T  
SINCE JUL 1 12.0 21.0 -9.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 0 3 -3 3  
MONTH TO DATE 117 87 30 163  
SINCE MAR 1 932 1054 -122 993  
SINCE JUL 1 4125 4564 -439 4137  
 
COOLING  
TODAY 3 3 0 0  
MONTH TO DATE 20 38 -18 19  
SINCE MAR 1 46 60 -14 22  
SINCE JAN 1 46 60 -14 22    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION SW (220)  
HIGHEST GUST SPEED 17 HIGHEST GUST DIRECTION S (160)  
AVERAGE WIND SPEED 2.0  
 
SKY COVER  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 83 3:00 AM  
LOWEST 30 3:00 PM  
AVERAGE 57  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 76 93 1996  
MINIMUM TEMPERATURE (F) 54 36 2002  
 
SUNRISE AND SUNSET  
MAY 19 2021...........SUNRISE 5:54 AM EDT SUNSET 8:19 PM EDT  
MAY 20 2021...........SUNRISE 5:53 AM EDT SUNSET 8:20 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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