754  
CDUS41 KLWX 150521  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
121 AM EDT FRI OCT 15 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 14 2021
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
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 80 2:33 PM 86 1975 69 11 75  
MINIMUM 54 5:58 AM 23 1988 46 8 43  
AVERAGE 67 57 10 59  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 1.61 1995 0.11 -0.11 0.00  
MONTH TO DATE 0.03 1.69 -1.66 1.32  
SINCE SEP 1 4.75 5.63 -0.88 3.60  
SINCE JAN 1 29.34 34.85 -5.51 37.82  
 
SNOWFALL (IN)  
YESTERDAY 0.0 MM MM 0.0 0.0 0.0  
MONTH TO DATE 0.0 0.0 0.0 0.0  
SINCE SEP 1 0.0 0.0 0.0 0.0  
SINCE JUL 1 0.0 0.0 0.0 0.0  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 8 -8 6  
MONTH TO DATE 5 90 -85 82  
SINCE SEP 1 22 135 -113 143  
SINCE JUL 1 22 136 -114 143  
 
COOLING  
YESTERDAY 2 1 1 0  
MONTH TO DATE 47 19 28 4  
SINCE SEP 1 218 171 47 139  
SINCE JAN 1 1470 1227 243 1391    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION N (360)  
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION N (340)  
AVERAGE WIND SPEED 3.6  
 
SKY COVER  
AVERAGE SKY COVER 0.5  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
FOG  
FOG W/VISIBILITY <= 1/4 MILE  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 100 2:00 AM  
LOWEST 43 4:00 PM  
AVERAGE 72  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 68 88 1989  
MINIMUM TEMPERATURE (F) 46 28 1987  
 
SUNRISE AND SUNSET  
OCTOBER 15 2021.......SUNRISE 7:20 AM EDT SUNSET 6:31 PM EDT  
OCTOBER 16 2021.......SUNRISE 7:21 AM EDT SUNSET 6:29 PM EDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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