328  
CDUS41 KLWX 260531  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1231 AM EST TUE JAN 26 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 25 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 38 4:10 PM 73 1967 43 -5 51  
MINIMUM 31 11:59 PM -5 1987 24 7 36  
AVERAGE 35 33 2 44  
 
PRECIPITATION (IN)  
YESTERDAY 0.17 1.57 1978 0.09 0.08 1.47  
MONTH TO DATE 1.43 2.13 -0.70 3.33  
SINCE DEC 1 7.24 5.09 2.15 6.30  
SINCE JAN 1 1.43 2.13 -0.70 3.33  
 
SNOWFALL (IN)  
YESTERDAY 0.2 10.3 2000 0.3 -0.1 0.0  
MONTH TO DATE 0.2 5.6 -5.4 2.3  
SINCE DEC 1 2.6 9.1 -6.5 2.9  
SINCE JUL 1 2.6 9.6 -7.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 30 32 -2 21  
MONTH TO DATE 704 800 -96 638  
SINCE DEC 1 1506 1682 -176 1438  
SINCE JUL 1 2173 2598 -425 2301  
 
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 10 HIGHEST WIND DIRECTION E (90)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION E (70)  
AVERAGE WIND SPEED 4.2  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
LT FREEZING RAIN  
LIGHT SNOW  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 8:00 PM  
LOWEST 50 3:00 PM  
AVERAGE 71  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 70 1967  
MINIMUM TEMPERATURE (F) 24 3 1987  
 
SUNRISE AND SUNSET  
JANUARY 26 2021.......SUNRISE 7:21 AM EST SUNSET 5:24 PM EST  
JANUARY 27 2021.......SUNRISE 7:20 AM EST SUNSET 5:26 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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