900  
CDUS41 KLWX 162123  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
523 PM EDT FRI APR 16 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 16 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
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 59 2:10 PM 91 2002 67 -8 52  
MINIMUM 35 3:04 AM 28 1981 42 -7 33  
AVERAGE 47 55 -8 43  
 
PRECIPITATION (IN)  
TODAY 0.00 2.43 1993 0.11 -0.11 0.00  
MONTH TO DATE 1.51 1.88 -0.37 2.79  
SINCE MAR 1 3.78 5.26 -1.48 4.78  
SINCE JAN 1 9.94 10.68 -0.74 11.35  
 
SNOWFALL (IN)  
TODAY 0.0 T 1988 0.1 -0.1 0.0  
MONTH TO DATE T 0.3 -0.3 T  
SINCE MAR 1 T 3.1 -3.1 T  
SINCE JUL 1 12.0 22.0 -10.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 18 11 7 22  
MONTH TO DATE 167 212 -45 190  
SINCE MAR 1 682 859 -177 638  
SINCE JUL 1 3875 4449 -574 3782  
 
COOLING  
TODAY 0 1 -1 0  
MONTH TO DATE 5 4 1 0  
SINCE MAR 1 9 7 2 3  
SINCE JAN 1 9 7 2 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 9.9  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 82 3:00 AM  
LOWEST 42 4:00 PM  
AVERAGE 62  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 93 2002  
MINIMUM TEMPERATURE (F) 43 27 1983  
 
SUNRISE AND SUNSET  
APRIL 16 2021.........SUNRISE 6:31 AM EDT SUNSET 7:48 PM EDT  
APRIL 17 2021.........SUNRISE 6:30 AM EDT SUNSET 7:49 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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