432  
CDUS41 KLWX 230523  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1223 AM EST SAT JAN 23 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 22 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 1:16 PM 68 1986 43 6 40  
MINIMUM 26 8:00 AM -18 1984 24 2 16  
AVERAGE 38 33 5 28  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.18 1987 0.09 -0.09 0.00  
MONTH TO DATE 1.26 1.86 -0.60 1.79  
SINCE DEC 1 7.07 4.82 2.25 4.76  
SINCE JAN 1 1.26 1.86 -0.60 1.79  
 
SNOWFALL (IN)  
YESTERDAY 0.0 11.1 1987 0.3 -0.3 0.0  
MONTH TO DATE T 4.8 -4.8 2.3  
SINCE DEC 1 2.4 8.3 -5.9 2.9  
SINCE JUL 1 2.4 8.8 -6.4 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 27 32 -5 37  
MONTH TO DATE 605 704 -99 559  
SINCE DEC 1 1407 1586 -179 1359  
SINCE JUL 1 2074 2502 -428 2222  
 
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 24 HIGHEST WIND DIRECTION NW (310)  
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 8.7  
 
SKY COVER  
AVERAGE SKY COVER 0.3  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 84 8:00 AM  
LOWEST 31 2:00 PM  
AVERAGE 58  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 72 1967  
MINIMUM TEMPERATURE (F) 24 -4 1970  
1978  
 
SUNRISE AND SUNSET  
JANUARY 23 2021.......SUNRISE 7:23 AM EST SUNSET 5:21 PM EST  
JANUARY 24 2021.......SUNRISE 7:22 AM EST SUNSET 5:22 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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