Climatological Report (Daily)
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CDUS43 KLOT 122247
CLIMDW


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
446 PM CST TUE DEC 12 2017


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

...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR DECEMBER 12 2017...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1928 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE
                VALUE   (LST)  VALUE       VALUE  FROM
                                                  NORMAL
...............................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         32   1235 AM  62    1991  36     -4
  MINIMUM         18    742 AM  -7    1962  24     -6
  AVERAGE         25                        30     -5

PRECIPITATION (IN)
  TODAY            T             1.76 1972   0.08  -0.08
  MONTH TO DATE    0.05                      1.12  -1.07
  SINCE DEC 1      0.05                      1.12  -1.07
  SINCE JAN 1     41.33                     37.64   3.69

DEGREE DAYS
 HEATING
  TODAY           40                        35      5
  MONTH TO DATE  360                       399    -39
  SINCE DEC 1    360                       399    -39
  SINCE JUL 1   1343                      1534   -191

 COOLING
  TODAY            0                         0      0
  MONTH TO DATE    0                         0      0
  SINCE DEC 1      0                         0      0
  SINCE JAN 1   1151                      1045    106
...............................................................


WIND (MPH)
  RESULTANT WIND SPEED  17   RESULTANT WIND DIRECTION  NW (330)
  HIGHEST WIND SPEED    30   HIGHEST WIND DIRECTION    NW (330)
  HIGHEST GUST SPEED    38   HIGHEST GUST DIRECTION    NW (330)
  AVERAGE WIND SPEED    17.6


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.4


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  LIGHT SNOW


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


THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   36        67      1975
 MINIMUM TEMPERATURE (F)   23        -3      2000
                                             1958


SUNRISE AND SUNSET
DECEMBER 12 2017......SUNRISE   709 AM CST   SUNSET   420 PM CST
DECEMBER 13 2017......SUNRISE   710 AM CST   SUNSET   421 PM CST


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




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