Climatological Report (Daily)
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000
CDUS43 KLOT 120637
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1237 AM CST FRI DEC 12 2014


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 11 2014...

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)
 YESTERDAY
  MAXIMUM         32    340 PM  61    1949  36     -4       21
  MINIMUM         23    805 AM  -5    1972  22      1        1
  AVERAGE         28                        29     -1       11

PRECIPITATION (IN)
  YESTERDAY        0.00          1.73 1949   0.09  -0.09     0.05
  MONTH TO DATE    0.20                      0.97  -0.77     0.40
  SINCE DEC 1      0.20                      0.97  -0.77     0.40
  SINCE JAN 1     38.88                     35.61   3.27    40.55

SNOWFALL (IN)
  YESTERDAY        0.0           9.5  2000   0.2   -0.2      0.7
  MONTH TO DATE    T                         2.4   -2.4      4.0
  SINCE DEC 1      T                         2.4   -2.4      4.0
  SINCE JUL 1      2.9                       3.8   -0.9      4.9
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       37                        36      1       54
  MONTH TO DATE  378                       378      0      435
  SINCE DEC 1    378                       378      0      435
  SINCE JUL 1   1821                      1634    187     1718

 COOLING
  YESTERDAY        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    15   HIGHEST WIND DIRECTION     W (250)
  HIGHEST GUST SPEED    17   HIGHEST GUST DIRECTION     W (260)
  AVERAGE WIND SPEED     8.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.5


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  FOG
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    88           800 AM
 LOWEST     63           300 PM
 AVERAGE    76

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   35        61      1877
 MINIMUM TEMPERATURE (F)   21        -8      2000


SUNRISE AND SUNSET
DECEMBER 12 2014......SUNRISE   710 AM CST   SUNSET   420 PM CST
DECEMBER 13 2014......SUNRISE   711 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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