AFOS product CLIIAD
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741 
CDUS41 KLWX 170523
CLIIAD

CLIMATE REPORT 
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 
123 AM EDT SUN SEP 17 2023

...................................

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 16 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1960 TO 2023


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST      
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL           
...................................................................
TEMPERATURE (F)                                                          
 YESTERDAY                                                           
  MAXIMUM         84   3:07 PM  97    1991  79      5       82        
  MINIMUM         49   5:47 AM  37    1984  58     -9       52        
  AVERAGE         67                        69     -2       67     

PRECIPITATION (IN)                                                    
  YESTERDAY        0.00          2.05 1999   0.15  -0.15     0.00     
  MONTH TO DATE    3.50                      2.04   1.46     2.78     
  SINCE SEP 1      3.50                      2.04   1.46     2.78     
  SINCE JAN 1     22.72                     31.26  -8.54    30.28     

SNOWFALL (IN)                                                              
  YESTERDAY        0.0          MM      MM   0.0    0.0      0.0      
  MONTH TO DATE    T                         0.0    0.0      0.0      
  SINCE SEP 1      T                         0.0    0.0      0.0      
  SINCE JUL 1      T                         0.0    0.0      0.0      
  SNOW DEPTH       0                                                 

DEGREE DAYS                                                           
 HEATING                                                              
  YESTERDAY        0                         1     -1        0        
  MONTH TO DATE    0                         7     -7        0        
  SINCE SEP 1      0                         7     -7        0        
  SINCE JUL 1      0                         8     -8        0        

 COOLING                                                              
  YESTERDAY        2                         5     -3        2        
  MONTH TO DATE  199                       107     92      141        
  SINCE SEP 1    199                       107     92      141        
  SINCE JAN 1   1314                      1163    151     1319        
...................................................................


WIND (MPH)                                                            
  HIGHEST WIND SPEED    14   HIGHEST WIND DIRECTION     W (290)       
  HIGHEST GUST SPEED    21   HIGHEST GUST DIRECTION    NW (310)       
  AVERAGE WIND SPEED     4.1                                        


SKY COVER                                                             
  AVERAGE SKY COVER 0.1                                                 


WEATHER CONDITIONS                                                    
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         
  NO SIGNIFICANT WEATHER WAS OBSERVED.                                  


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           6:00 AM                                      
 LOWEST     MM                                                        
 AVERAGE    MM                                                        

..........................................................


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                     
 MAXIMUM TEMPERATURE (F)   79        97      1991                      
 MINIMUM TEMPERATURE (F)   58        35      1986                      


SUNRISE AND SUNSET                                                    
SEPTEMBER 17 2023.....SUNRISE   6:53 AM EDT   SUNSET   7:15 PM EDT     
SEPTEMBER 18 2023.....SUNRISE   6:54 AM EDT   SUNSET   7:14 PM EDT     


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




$$