872  
CDUS41 KLWX 250521  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1221 AM EST MON JAN 25 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 24 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 37 3:25 PM 73 1967 43 -6 50  
MINIMUM 22 7:08 AM -2 1987 24 -2 32  
AVERAGE 30 33 -3 41  
 
PRECIPITATION (IN)  
YESTERDAY T 1.33 2019 0.09 -0.09 0.07  
MONTH TO DATE 1.26 2.04 -0.78 1.86  
SINCE DEC 1 7.07 5.00 2.07 4.83  
SINCE JAN 1 1.26 2.04 -0.78 1.86  
 
SNOWFALL (IN)  
YESTERDAY T 2.5 1977 0.3 -0.3 0.0  
MONTH TO DATE T 5.3 -5.3 2.3  
SINCE DEC 1 2.4 8.8 -6.4 2.9  
SINCE JUL 1 2.4 9.3 -6.9 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 35 32 3 24  
MONTH TO DATE 674 768 -94 617  
SINCE DEC 1 1476 1650 -174 1417  
SINCE JUL 1 2143 2566 -423 2280  
 
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 16 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 24 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 6.1  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 66 11:00 PM  
LOWEST 35 4:00 PM  
AVERAGE 51  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 73 1967  
MINIMUM TEMPERATURE (F) 24 -5 1987  
 
SUNRISE AND SUNSET  
JANUARY 25 2021.......SUNRISE 7:21 AM EST SUNSET 5:23 PM EST  
JANUARY 26 2021.......SUNRISE 7:21 AM EST SUNSET 5:24 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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