533  
CDUS41 KLWX 170523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
123 AM EDT WED MAR 17 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 16 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 44 4:42 PM 81 1990 55 -11 53  
MINIMUM 39 7:41 AM 16 1969 33 6 31  
AVERAGE 42 44 -2 42  
 
PRECIPITATION (IN)  
YESTERDAY T 1.56 2007 0.12 -0.12 0.00  
MONTH TO DATE 0.18 1.59 -1.41 0.58  
SINCE MAR 1 0.18 1.59 -1.41 0.58  
SINCE JAN 1 6.34 7.01 -0.67 7.15  
 
SNOWFALL (IN)  
YESTERDAY T 6.6 2014 0.1 -0.1 0.0  
MONTH TO DATE T 1.9 -1.9 T  
SINCE MAR 1 T 1.9 -1.9 T  
SINCE JUL 1 12.0 20.8 -8.8 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 23 21 2 23  
MONTH TO DATE 319 374 -55 260  
SINCE MAR 1 319 374 -55 260  
SINCE JUL 1 3512 3964 -452 3404  
 
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 15 HIGHEST WIND DIRECTION SE (140)  
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION SE (140)  
AVERAGE WIND SPEED 7.7  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 89 11:00 PM  
LOWEST 36 12:00 AM  
AVERAGE 63  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 56 77 1963  
MINIMUM TEMPERATURE (F) 33 16 1970  
 
SUNRISE AND SUNSET  
MARCH 17 2021.........SUNRISE 7:18 AM EDT SUNSET 7:19 PM EDT  
MARCH 18 2021.........SUNRISE 7:16 AM EDT SUNSET 7:20 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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