745  
CDUS41 KLWX 102124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
524 PM EDT SAT APR 10 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR APRIL 10 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 68 3:59 PM 89 2013 65 3 51  
MINIMUM 54 6:28 AM 19 1985 41 13 34  
AVERAGE 61 53 8 43  
 
PRECIPITATION (IN)  
TODAY T 0.84 1983 0.12 -0.12 0.00  
MONTH TO DATE 0.75 1.21 -0.46 0.48  
SINCE MAR 1 3.02 4.59 -1.57 2.47  
SINCE JAN 1 9.18 10.01 -0.83 9.04  
 
SNOWFALL (IN)  
TODAY MM T 1973 0.0 MM 0.0  
1996  
MONTH TO DATE T 0.2 -0.2 0.0  
SINCE MAR 1 T 3.0 -3.0 T  
SINCE JUL 1 12.0 21.9 -9.9 2.9  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 4 13 -9 22  
MONTH TO DATE 115 142 -27 103  
SINCE MAR 1 630 789 -159 551  
SINCE JUL 1 3823 4379 -556 3695  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 4 3 1 3  
SINCE JAN 1 4 3 1 3    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION S (190)  
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION S (180)  
AVERAGE WIND SPEED 4.8  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
LIGHT RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 97 9:00 AM  
LOWEST 65 4:00 PM  
AVERAGE 81  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 65 87 1977  
MINIMUM TEMPERATURE (F) 41 25 1960  
1970  
1971  
 
SUNRISE AND SUNSET  
APRIL 10 2021.........SUNRISE 6:40 AM EDT SUNSET 7:42 PM EDT  
APRIL 11 2021.........SUNRISE 6:39 AM EDT SUNSET 7:43 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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