603  
CDUS41 KLWX 220522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1222 AM EST MON FEB 22 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 21 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 39 3:30 PM 80 2018 48 -9 38  
MINIMUM 16 6:22 AM 7 1968 27 -11 21  
1972  
AVERAGE 28 37 -9 30  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 0.93 2015 0.10 -0.10 0.00  
MONTH TO DATE 2.67 2.07 0.60 2.15  
SINCE DEC 1 10.36 7.71 2.65 8.45  
SINCE JAN 1 4.55 4.75 -0.20 5.48  
 
SNOWFALL (IN)  
YESTERDAY 0.0 8.9 2015 0.2 -0.2 0.0  
MONTH TO DATE 6.2 6.1 0.1 T  
SINCE DEC 1 11.8 16.9 -5.1 2.9  
SINCE JUL 1 11.8 17.4 -5.6 2.9  
SNOW DEPTH 1  
 
DEGREE DAYS  
HEATING  
YESTERDAY 37 28 9 35  
MONTH TO DATE 664 621 43 478  
SINCE DEC 1 2370 2489 -119 2082  
SINCE JUL 1 3037 3405 -368 2945  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 0 0 0 0    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 12 HIGHEST WIND DIRECTION SE (150)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION S (160)  
AVERAGE WIND SPEED 4.4  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 74 7:00 AM  
LOWEST 34 1:00 PM  
AVERAGE 54  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 48 71 1991  
MINIMUM TEMPERATURE (F) 27 4 1968  
 
SUNRISE AND SUNSET  
FEBRUARY 22 2021......SUNRISE 6:52 AM EST SUNSET 5:55 PM EST  
FEBRUARY 23 2021......SUNRISE 6:50 AM EST SUNSET 5:56 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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