789  
CDUS41 KLWX 212124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
524 PM EDT WED APR 21 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 21 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 63 9:22 AM 89 1985 69 -6 68  
MINIMUM 48 3:59 PM 29 1983 44 4 43  
AVERAGE 56 56 0 56  
 
PRECIPITATION (IN)  
TODAY 0.00 2.20 1992 0.11 -0.11 0.01  
MONTH TO DATE 1.51 2.42 -0.91 2.86  
SINCE MAR 1 3.78 5.80 -2.02 4.85  
SINCE JAN 1 9.94 11.22 -1.28 11.42  
 
SNOWFALL (IN)  
TODAY 0.0 0.0 2001 0.0 0.0 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 9 10 -1 9  
MONTH TO DATE 217 263 -46 267  
SINCE MAR 1 732 910 -178 715  
SINCE JUL 1 3925 4500 -575 3859  
 
COOLING  
TODAY 0 1 -1 0  
MONTH TO DATE 5 9 -4 0  
SINCE MAR 1 9 12 -3 3  
SINCE JAN 1 9 12 -3 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 37 HIGHEST WIND DIRECTION W (290)  
HIGHEST GUST SPEED 49 HIGHEST GUST DIRECTION NW (310)  
AVERAGE WIND SPEED 17.6  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 62 8:00 AM  
LOWEST 38 3:00 PM  
AVERAGE 50  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 69 92 1985  
MINIMUM TEMPERATURE (F) 44 27 1975  
 
SUNRISE AND SUNSET  
APRIL 21 2021.........SUNRISE 6:24 AM EDT SUNSET 7:53 PM EDT  
APRIL 22 2021.........SUNRISE 6:23 AM EDT SUNSET 7:54 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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