831  
CDUS41 KLWX 300530  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1230 AM EST SAT JAN 30 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR JANUARY 29 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 31 5:02 PM 75 1975 43 -12 44  
MINIMUM 22 7:30 AM -1 1963 24 -2 26  
1987  
AVERAGE 27 34 -7 35  
 
PRECIPITATION (IN)  
YESTERDAY T 0.95 1990 0.09 -0.09 0.00  
MONTH TO DATE 1.57 2.49 -0.92 3.33  
SINCE DEC 1 7.38 5.45 1.93 6.30  
SINCE JAN 1 1.57 2.49 -0.92 3.33  
 
SNOWFALL (IN)  
YESTERDAY T 7.2 1966 0.3 -0.3 0.0  
MONTH TO DATE 0.2 6.7 -6.5 2.3  
SINCE DEC 1 2.6 10.2 -7.6 2.9  
SINCE JUL 1 2.6 10.7 -8.1 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 38 31 7 30  
MONTH TO DATE 833 925 -92 742  
SINCE DEC 1 1635 1807 -172 1542  
SINCE JUL 1 2302 2723 -421 2405  
 
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 28 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 40 HIGHEST GUST DIRECTION NW (300)  
AVERAGE WIND SPEED 15.9  
 
SKY COVER  
AVERAGE SKY COVER 0.7  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
LIGHT SNOW  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 52 7:00 AM  
LOWEST 38 3:00 PM  
AVERAGE 45  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 43 72 2013  
MINIMUM TEMPERATURE (F) 24 2 1965  
 
SUNRISE AND SUNSET  
JANUARY 30 2021.......SUNRISE 7:18 AM EST SUNSET 5:29 PM EST  
JANUARY 31 2021.......SUNRISE 7:17 AM EST SUNSET 5:30 PM EST  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab VA Page
The Nexlab MD Page
The Nexlab WV Page Main Text Page