746  
CDUS41 KLWX 282125  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
425 PM EST THU JAN 28 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 28 2021
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 35 3:59 PM 68 2002 43 -8 45  
MINIMUM 29 9:51 AM -17 1987 24 5 38  
AVERAGE 32 34 -2 42  
 
PRECIPITATION (IN)  
TODAY 0.00 1.64 1998 0.10 -0.10 0.00  
MONTH TO DATE 1.57 2.40 -0.83 3.33  
SINCE DEC 1 7.38 5.36 2.02 6.30  
SINCE JAN 1 1.57 2.40 -0.83 3.33  
 
SNOWFALL (IN)  
TODAY 0.0 6.7 1994 0.3 -0.3 0.0  
MONTH TO DATE 0.2 6.4 -6.2 2.3  
SINCE DEC 1 2.6 9.9 -7.3 2.9  
SINCE JUL 1 2.6 10.4 -7.8 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 33 31 2 23  
MONTH TO DATE 794 894 -100 712  
SINCE DEC 1 1596 1776 -180 1512  
SINCE JUL 1 2263 2692 -429 2375  
 
COOLING  
TODAY 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 30 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 43 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 17.5  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 63 12:00 AM  
LOWEST 35 3:00 PM  
AVERAGE 49  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 75 1975  
MINIMUM TEMPERATURE (F) 24 -1 1963  
1987  
 
SUNRISE AND SUNSET  
JANUARY 28 2021.......SUNRISE 7:19 AM EST SUNSET 5:27 PM EST  
JANUARY 29 2021.......SUNRISE 7:18 AM EST SUNSET 5:28 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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