Climatological Report (Daily)
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CDUS43 KLOT 182243
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
442 PM CST THU DEC 18 2014


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR DECEMBER 18 2014...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2014


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         28    359 PM  62    1877  34     -6       35
  MINIMUM         19    726 AM -11    1983  20     -1       15
  AVERAGE         24                        27     -3       25

PRECIPITATION (IN)
  TODAY            0.00          1.41 2002   0.06  -0.06     0.00
  MONTH TO DATE    0.28                      1.45  -1.17     0.70
  SINCE DEC 1      0.28                      1.45  -1.17     0.70
  SINCE JAN 1     38.96                     36.09   2.87    40.85

SNOWFALL (IN)
  TODAY            0.0           6.7  1929   0.2   -0.2      0.0
  MONTH TO DATE    T                         4.3   -4.3      9.3
  SINCE DEC 1      T                         4.3   -4.3      9.3
  SINCE JUL 1      2.9                       5.7   -2.8     10.2

DEGREE DAYS
 HEATING
  TODAY           41                        38      3       40
  MONTH TO DATE  582                       640    -58      752
  SINCE DEC 1    582                       640    -58      752
  SINCE JUL 1   2025                      1896    129     2035

 COOLING
  TODAY            0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    799                       843    -44      933
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    10   HIGHEST WIND DIRECTION     W (250)
  HIGHEST GUST SPEED    13   HIGHEST GUST DIRECTION     W (250)
  AVERAGE WIND SPEED     5.3


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.7


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    84           800 AM
 LOWEST     63           200 PM
 AVERAGE    74

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   34        64      1877
 MINIMUM TEMPERATURE (F)   20       -14      1983


SUNRISE AND SUNSET
DECEMBER 18 2014......SUNRISE   714 AM CST   SUNSET   422 PM CST
DECEMBER 19 2014......SUNRISE   715 AM CST   SUNSET   422 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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