AFOS product CLIIAD
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CDUS41 KLWX 110524
CLIIAD

CLIMATE REPORT 
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 
124 AM EDT FRI SEP 11 2020

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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR SEPTEMBER 10 2020...

CLIMATE NORMAL PERIOD: 1981 TO 2010
CLIMATE RECORD PERIOD: 1960 TO 2020


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST      
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL           
...................................................................
TEMPERATURE (F)                                                          
 YESTERDAY                                                           
  MAXIMUM         83   3:48 PM  99    1983  82      1       85        
  MINIMUM         74  11:59 PM  43    1981  59     15       60        
  AVERAGE         79                        70      9       73     

PRECIPITATION (IN)                                                    
  YESTERDAY        0.11          1.50 1968   0.12  -0.01     0.00     
  MONTH TO DATE    1.16                      1.19  -0.03     0.32     
  SINCE SEP 1      1.16                      1.19  -0.03     0.32     
  SINCE JAN 1     35.38                     29.19   6.19    30.16     

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                         1     -1        0        
  MONTH TO DATE    0                         3     -3        0        
  SINCE SEP 1      0                         3     -3        0        
  SINCE JUL 1      0                         5     -5        0        

 COOLING                                                              
  YESTERDAY       14                         6      8        8        
  MONTH TO DATE   91                        71     20       89        
  SINCE SEP 1     91                        71     20       89        
  SINCE JAN 1   1343                      1087    256     1324        
...................................................................


WIND (MPH)                                                            
  HIGHEST WIND SPEED    12   HIGHEST WIND DIRECTION     N (360)       
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION    NE (50)        
  AVERAGE WIND SPEED     5.1                                        


SKY COVER                                                             
  AVERAGE SKY COVER 0.8                                                 


WEATHER CONDITIONS                                                    
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         
  RAIN                                                                
  LIGHT RAIN                                                          
  FOG                                                                 


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    97           2:00 AM                                      
 LOWEST     77           2:00 PM                                      
 AVERAGE    87                                                        

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                     
 MAXIMUM TEMPERATURE (F)   81        99      1983                      
 MINIMUM TEMPERATURE (F)   58        40      1976                      


SUNRISE AND SUNSET                                                    
SEPTEMBER 11 2020.....SUNRISE   6:48 AM EDT   SUNSET   7:24 PM EDT     
SEPTEMBER 12 2020.....SUNRISE   6:49 AM EDT   SUNSET   7:22 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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