900  
CDUS41 KLWX 130520  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1220 AM EST SAT MAR 13 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 12 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 70 5:19 PM 89 1990 54 16 66  
MINIMUM 54 4:02 AM 18 1969 32 22 39  
1984  
1998  
AVERAGE 62 43 19 53  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.41 1968 0.10 -0.10 0.00  
MONTH TO DATE 0.18 1.15 -0.97 0.15  
SINCE MAR 1 0.18 1.15 -0.97 0.15  
SINCE JAN 1 6.34 6.57 -0.23 6.72  
 
SNOWFALL (IN)  
YESTERDAY 0.0 4.5 1968 0.1 -0.1 0.0  
MONTH TO DATE 0.0 1.6 -1.6 0.0  
SINCE MAR 1 0.0 1.6 -1.6 0.0  
SINCE JUL 1 12.0 20.5 -8.5 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 3 22 -19 12  
MONTH TO DATE 238 288 -50 193  
SINCE MAR 1 238 288 -50 193  
SINCE JUL 1 3431 3878 -447 3337  
 
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 22 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 8.3  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 72 12:00 PM  
LOWEST 25 6:00 PM  
AVERAGE 49  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 54 87 1990  
MINIMUM TEMPERATURE (F) 32 16 1998  
 
SUNRISE AND SUNSET  
MARCH 13 2021.........SUNRISE 6:24 AM EST SUNSET 6:15 PM EST  
MARCH 14 2021.........SUNRISE 7:22 AM EDT SUNSET 7:16 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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