AFOS product CLIIAD
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CDUS41 KLWX 100523
CLIIAD

CLIMATE REPORT 
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 
123 AM EDT SUN SEP 10 2023

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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 9 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         90  12:50 PM  98    2016  82      8       83        
  MINIMUM         68   8:33 PM  40    1986  61      7       58        
  AVERAGE         79                        71      8       71     

PRECIPITATION (IN)                                                    
  YESTERDAY        0.81          1.40 2018   0.13   0.68     0.00     
  MONTH TO DATE    1.24                      1.10   0.14     1.91     
  SINCE SEP 1      1.24                      1.10   0.14     1.91     
  SINCE JAN 1     20.46                     30.32  -9.86    29.41     

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                         0      0        0        
  MONTH TO DATE    0                         0      0        0        
  SINCE SEP 1      0                         0      0        0        
  SINCE JUL 1      0                         1     -1        0        

 COOLING                                                              
  YESTERDAY       14                         7      7        6        
  MONTH TO DATE  140                        68     72       96        
  SINCE SEP 1    140                        68     72       96        
  SINCE JAN 1   1255                      1124    131     1274        
...................................................................


WIND (MPH)                                                            
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION     E (110)       
  HIGHEST GUST SPEED    33   HIGHEST GUST DIRECTION    SE (120)       
  AVERAGE WIND SPEED     3.6                                        


SKY COVER                                                             
  AVERAGE SKY COVER 0.8                                                 


WEATHER CONDITIONS                                                    
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         
  THUNDERSTORM                                                        
  HEAVY RAIN                                                          
  RAIN                                                                
  LIGHT RAIN                                                          
  FOG                                                                 
  HAZE                                                                


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           4:00 PM                                      
 LOWEST     50           1:00 PM                                      
 AVERAGE    72                                                        

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                     
 MAXIMUM TEMPERATURE (F)   82        99      1983                      
 MINIMUM TEMPERATURE (F)   60        43      1981                      


SUNRISE AND SUNSET                                                    
SEPTEMBER 10 2023.....SUNRISE   6:47 AM EDT   SUNSET   7:26 PM EDT     
SEPTEMBER 11 2023.....SUNRISE   6:47 AM EDT   SUNSET   7:25 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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