726  
CDUS41 KLWX 160522  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
1222 AM EST TUE FEB 16 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR FEBRUARY 15 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 3:17 PM 76 2018 46 -9 37  
MINIMUM 34 11:24 PM 6 2015 26 8 15  
AVERAGE 36 36 0 26  
 
PRECIPITATION (IN)  
YESTERDAY 0.57R 0.52 1992 0.10 0.47 0.00  
MONTH TO DATE 1.90 1.48 0.42 2.13  
SINCE DEC 1 9.59 7.12 2.47 8.43  
SINCE JAN 1 3.78 4.16 -0.38 5.46  
 
SNOWFALL (IN)  
YESTERDAY 0.0 4.2 2003 0.3 -0.3 0.0  
MONTH TO DATE 5.2 4.5 0.7 T  
SINCE DEC 1 10.8 15.3 -4.5 2.9  
SINCE JUL 1 10.8 15.8 -5.0 2.9  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 29 29 0 39  
MONTH TO DATE 457 451 6 326  
SINCE DEC 1 2163 2319 -156 1930  
SINCE JUL 1 2830 3235 -405 2793  
 
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 12 HIGHEST WIND DIRECTION N (350)  
HIGHEST GUST SPEED 15 HIGHEST GUST DIRECTION N (10)  
AVERAGE WIND SPEED 5.4  
 
SKY COVER  
AVERAGE SKY COVER 1.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
RAIN  
LIGHT RAIN  
FOG  
HAZE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 11:00 PM  
LOWEST 69 10:00 AM  
AVERAGE 85  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 47 70 1976  
MINIMUM TEMPERATURE (F) 26 6 2015  
 
SUNRISE AND SUNSET  
FEBRUARY 16 2021......SUNRISE 6:59 AM EST SUNSET 5:49 PM EST  
FEBRUARY 17 2021......SUNRISE 6:58 AM EST SUNSET 5:50 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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