738  
CDUS41 KLWX 270528  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1228 AM EST WED JAN 27 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 26 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 4:53 PM 70 1967 43 -6 47  
MINIMUM 31 12:38 AM 3 1987 24 7 28  
AVERAGE 34 34 0 38  
 
PRECIPITATION (IN)  
YESTERDAY 0.14 1.31 2011 0.09 0.05 0.00  
MONTH TO DATE 1.57 2.22 -0.65 3.33  
SINCE DEC 1 7.38 5.18 2.20 6.30  
SINCE JAN 1 1.57 2.22 -0.65 3.33  
 
SNOWFALL (IN)  
YESTERDAY 0.0 7.3 2011 0.2 -0.2 0.0  
MONTH TO DATE 0.2 5.8 -5.6 2.3  
SINCE DEC 1 2.6 9.3 -6.7 2.9  
SINCE JUL 1 2.6 9.8 -7.2 2.9  
SNOW DEPTH T  
 
DEGREE DAYS  
HEATING  
YESTERDAY 31 32 -1 27  
MONTH TO DATE 735 832 -97 665  
SINCE DEC 1 1537 1714 -177 1465  
SINCE JUL 1 2204 2630 -426 2328  
 
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 9 HIGHEST WIND DIRECTION N (10)  
HIGHEST GUST SPEED 12 HIGHEST GUST DIRECTION E (70)  
AVERAGE WIND SPEED 1.9  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT RAIN  
LT FREEZING RAIN  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 9:00 PM  
LOWEST 88 12:00 AM  
AVERAGE 94  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 71 1974  
MINIMUM TEMPERATURE (F) 24 -9 1987  
 
SUNRISE AND SUNSET  
JANUARY 27 2021.......SUNRISE 7:20 AM EST SUNSET 5:26 PM EST  
JANUARY 28 2021.......SUNRISE 7:19 AM EST SUNSET 5:27 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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