331  
CDUS41 KLWX 042121  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
421 PM EST THU MAR 04 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR MARCH 4 2021
 
 
VALID TODAY AS OF 0400 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 54 2:59 PM 79 1974 51 3 65  
1983  
MINIMUM 35 2:06 AM -1 2014 29 6 40  
AVERAGE 45 40 5 53  
 
PRECIPITATION (IN)  
TODAY 0.00 2.16 1993 0.09 -0.09 T  
MONTH TO DATE 0.18 0.37 -0.19 0.07  
SINCE MAR 1 0.18 0.37 -0.19 0.07  
SINCE JAN 1 6.34 5.79 0.55 6.64  
 
SNOWFALL (IN)  
TODAY 0.0 0.6 1971 0.1 -0.1 0.0  
2016  
MONTH TO DATE 0.0 0.6 -0.6 0.0  
SINCE MAR 1 0.0 0.6 -0.6 0.0  
SINCE JUL 1 12.0 19.5 -7.5 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 20 25 -5 12  
MONTH TO DATE 91 101 -10 68  
SINCE MAR 1 91 101 -10 68  
SINCE JUL 1 3284 3691 -407 3212  
 
COOLING  
TODAY 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 28 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 38 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 10.8  
 
SKY COVER  
AVERAGE SKY COVER 0.4  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 62 2:00 AM  
LOWEST 33 3:00 PM  
AVERAGE 48  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 52 79 1976  
MINIMUM TEMPERATURE (F) 30 7 1978  
 
SUNRISE AND SUNSET  
MARCH 4 2021.........SUNRISE 6:37 AM EST SUNSET 6:06 PM EST  
MARCH 5 2021.........SUNRISE 6:36 AM EST SUNSET 6:07 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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