249  
CDUS41 KLWX 200523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT SAT MAR 20 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 19 2021
 
 
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)  
YESTERDAY  
MAXIMUM 49 4:07 PM 76 2012 57 -8 74  
MINIMUM 36 8:12 AM 10 1967 34 2 47  
AVERAGE 43 45 -2 61  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.07 1975 0.12 -0.12 0.29  
MONTH TO DATE 0.59 1.93 -1.34 0.95  
SINCE MAR 1 0.59 1.93 -1.34 0.95  
SINCE JAN 1 6.75 7.35 -0.60 7.52  
 
SNOWFALL (IN)  
YESTERDAY 0.0 1.5 1997 0.0 0.0 0.0  
MONTH TO DATE T 2.1 -2.1 T  
SINCE MAR 1 T 2.1 -2.1 T  
SINCE JUL 1 12.0 21.0 -9.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 22 20 2 4  
MONTH TO DATE 375 435 -60 293  
SINCE MAR 1 375 435 -60 293  
SINCE JUL 1 3568 4025 -457 3437  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE MAR 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 26 HIGHEST WIND DIRECTION N (20)  
HIGHEST GUST SPEED 36 HIGHEST GUST DIRECTION N (10)  
AVERAGE WIND SPEED 15.3  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 86 12:00 AM  
LOWEST 23 5:00 PM  
AVERAGE 55  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 57 80 2020  
MINIMUM TEMPERATURE (F) 34 18 1981  
 
SUNRISE AND SUNSET  
MARCH 20 2021.........SUNRISE 7:13 AM EDT SUNSET 7:22 PM EDT  
MARCH 21 2021.........SUNRISE 7:11 AM EDT SUNSET 7:23 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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