169 
CDUS41 KLWX 182129
CLIDCA


CLIMATE REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC                  
429 PM EST MON DEC 18 2017


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

...THE WASHINGTON NATIONAL DC CLIMATE SUMMARY FOR DECEMBER 18 2017...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE          
                VALUE   (LST)  VALUE       VALUE  FROM               
                                                  NORMAL             
...............................................................
TEMPERATURE (F)                                                     
 TODAY                                                               
  MAXIMUM         56    328 PM  74    2006  46     10                
  MINIMUM         39    822 AM  10    1926  32      7                
                                      1919                          
  AVERAGE         48                        39      9               
                                                                     
PRECIPITATION (IN)                                                   
  TODAY            0.00          2.81 1977   0.09  -0.09             
  MONTH TO DATE    0.29                      1.87  -1.58             
  SINCE DEC 1      0.29                      1.87  -1.58             
  SINCE JAN 1     35.39                     38.56  -3.17             
                                                                     
SNOWFALL (IN)                                                        
  TODAY            0.0           3.0  1945   0.1   -0.1              
                                      1916                          
  MONTH TO DATE    1.7                       1.2    0.5              
  SINCE JUL 1      1.7                       1.7    0.0              
  SNOW DEPTH       0                                                 
                                                                     
DEGREE DAYS                                                          
 HEATING                                                             
  TODAY           17                               -9                
  MONTH TO DATE  421                               -6                
  SINCE DEC 1    421                               -6                
  SINCE JUL 1    970                             -152                
                                                                     
 COOLING                                                             
  TODAY            0                                0                
  MONTH TO DATE    0                                0                
  SINCE DEC 1      0                                0                
  SINCE JAN 1   1826                              277                
...............................................................


WIND (MPH)                                                           
  HIGHEST WIND SPEED    12   HIGHEST WIND DIRECTION     S (170)      
  HIGHEST GUST SPEED    14   HIGHEST GUST DIRECTION     S (170)      
  AVERAGE WIND SPEED     3.9                                         



                                                                     
RELATIVE HUMIDITY (PERCENT)                                          
 HIGHEST    82                                                       
 LOWEST     46                                                       
 AVERAGE    64                                                       

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

                                                                     
THE WASHINGTON NATIONAL DC CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR                    
 MAXIMUM TEMPERATURE (F)   46        74      1924                    
 MINIMUM TEMPERATURE (F)   32         6      1884                    

                                                                     
SUNRISE AND SUNSET                                                   
DECEMBER 18 2017......SUNRISE   721 AM EST   SUNSET   448 PM EST   
DECEMBER 19 2017......SUNRISE   722 AM EST   SUNSET   449 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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