459  
CDUS41 KLWX 222124  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
524 PM EDT FRI OCT 22 2021  
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR OCTOBER 22 2021
 
 
VALID TODAY AS OF 0500 PM LOCAL TIME.  
 
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)  
TODAY  
MAXIMUM 69 2:30 PM 85 1979 66 3 82  
MINIMUM 58 7:17 AM 26 1974 43 15 59  
AVERAGE 64 54 10 71  
 
PRECIPITATION (IN)  
TODAY 0.00 0.90 1985 0.12 -0.12 0.00  
MONTH TO DATE 0.49 2.64 -2.15 1.33  
SINCE SEP 1 5.21 6.58 -1.37 3.61  
SINCE JAN 1 29.80 35.80 -6.00 37.83  
 
SNOWFALL (IN)  
TODAY 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  
TODAY 1 11 -10 0  
MONTH TO DATE 40 169 -129 128  
SINCE SEP 1 57 214 -157 189  
SINCE JUL 1 57 215 -158 189  
 
COOLING  
TODAY 0 0 0 6  
MONTH TO DATE 52 19 33 14  
SINCE SEP 1 223 171 52 149  
SINCE JAN 1 1475 1227 248 1401    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 21 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 9.1  
 
SKY COVER  
AVERAGE SKY COVER 0.6  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 73 3:00 AM  
LOWEST 45 12:00 PM  
AVERAGE 59  
   
......................................................
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 65 85 1978  
MINIMUM TEMPERATURE (F) 43 21 1969  
 
SUNRISE AND SUNSET  
OCTOBER 22 2021.......SUNRISE 7:27 AM EDT SUNSET 6:21 PM EDT  
OCTOBER 23 2021.......SUNRISE 7:28 AM EDT SUNSET 6:20 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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