954  
CDUS41 KLWX 260533  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1233 AM EST SAT DEC 26 2020  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 25 2020
 
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
CLIMATE RECORD PERIOD: 1960 TO 2020  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 55 1:17 AM 71 1964 44 11 50  
1982  
MINIMUM 22 11:59 PM -4 1989 25 -3 23  
AVERAGE 39 34 5 37  
 
PRECIPITATION (IN)  
YESTERDAY 0.31 0.82 1969 0.09 0.22 0.00  
MONTH TO DATE 5.81 2.48 3.33 2.34  
SINCE DEC 1 5.81 2.48 3.33 2.34  
SINCE JAN 1 49.46 41.06 8.40 40.18  
 
SNOWFALL (IN)  
YESTERDAY T 6.0 1969 0.1 -0.1 0.0  
MONTH TO DATE 2.4 2.6 -0.2 0.6  
SINCE DEC 1 2.4 2.6 -0.2 0.6  
SINCE JUL 1 2.4 3.1 -0.7 0.6  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 26 31 -5 28  
MONTH TO DATE 629 696 -67 693  
SINCE DEC 1 629 696 -67 693  
SINCE JUL 1 1296 1612 -316 1556  
 
COOLING  
YESTERDAY 0 0 0 0  
MONTH TO DATE 0 0 0 0  
SINCE DEC 1 0 0 0 0  
SINCE JAN 1 1406 1178 228 1524    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION NW (300)  
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 13.2  
 
SKY COVER  
AVERAGE SKY COVER 0.9  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
HEAVY RAIN  
RAIN  
LIGHT RAIN  
LIGHT SNOW  
FOG  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 96 12:00 AM  
LOWEST 44 6:00 PM  
AVERAGE 70  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 71 1964  
MINIMUM TEMPERATURE (F) 25 -1 1983  
 
SUNRISE AND SUNSET  
DECEMBER 26 2020......SUNRISE 7:27 AM EST SUNSET 4:54 PM EST  
DECEMBER 27 2020......SUNRISE 7:28 AM EST SUNSET 4:55 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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