AFOS product CLIIAD
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CDUS41 KLWX 070524
CLIIAD

CLIMATE REPORT 
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 
1224 AM EST MON DEC 07 2020

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

...THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR DECEMBER 6 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         45   1:35 PM  79    1998  49     -4       50        
  MINIMUM         31  11:42 PM   9    2002  29      2       31        
  AVERAGE         38                        39     -1       41     

PRECIPITATION (IN)                                                    
  YESTERDAY        0.00          1.03 2016   0.11  -0.11      T       
  MONTH TO DATE    0.99                      0.66   0.33     0.46     
  SINCE DEC 1      0.99                      0.66   0.33     0.46     
  SINCE JAN 1     44.64                     39.24   5.40    38.30     

SNOWFALL (IN)                                                              
  YESTERDAY        0.0           1.0  2003   0.1   -0.1      0.0      
  MONTH TO DATE    0.0                       0.5   -0.5       T       
  SINCE DEC 1      0.0                       0.5   -0.5       T       
  SINCE JUL 1      0.0                       1.0   -1.0       T       
  SNOW DEPTH       0                                                 

DEGREE DAYS                                                           
 HEATING                                                              
  YESTERDAY       27                        26      1       24        
  MONTH TO DATE  137                       150    -13      150        
  SINCE DEC 1    137                       150    -13      150        
  SINCE JUL 1    804                      1066   -262     1013        

 COOLING                                                              
  YESTERDAY        0                         0      0        0        
  MONTH TO DATE    0                         0      0        0        
  SINCE DEC 1      0                         0      0        0        
  SINCE JAN 1   1406                      1178    228     1524        
...................................................................


WIND (MPH)                                                            
  HIGHEST WIND SPEED    20   HIGHEST WIND DIRECTION    NW (310)       
  HIGHEST GUST SPEED    26   HIGHEST GUST DIRECTION    NW (320)       
  AVERAGE WIND SPEED    11.4                                        


SKY COVER                                                             
  AVERAGE SKY COVER 0.5                                                 


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    64           9:00 PM                                      
 LOWEST     47           2:00 PM                                      
 AVERAGE    56                                                        

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


THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                     
 MAXIMUM TEMPERATURE (F)   49        77      1998                      
 MINIMUM TEMPERATURE (F)   29         1      2002                      


SUNRISE AND SUNSET                                                    
DECEMBER  7 2020......SUNRISE   7:15 AM EST   SUNSET   4:47 PM EST     
DECEMBER  8 2020......SUNRISE   7:16 AM EST   SUNSET   4:47 PM EST     


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




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