Climatological Report (Daily)
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000
CDUS43 KLOT 130639
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1239 AM CST SAT DEC 13 2014


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 12 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         37    407 PM  61    1877  35      2       19
  MINIMUM         23    431 AM  -8    2000  21      2       -3
  AVERAGE         30                        28      2        8

PRECIPITATION (IN)
  YESTERDAY        T             1.76 1972   0.07  -0.07     0.00
  MONTH TO DATE    0.20                      1.04  -0.84     0.40
  SINCE DEC 1      0.20                      1.04  -0.84     0.40
  SINCE JAN 1     38.88                     35.68   3.20    40.55

SNOWFALL (IN)
  YESTERDAY        T            11.0  1903   0.3   -0.3      0.0
  MONTH TO DATE    T                         2.7   -2.7      4.0
  SINCE DEC 1      T                         2.7   -2.7      4.0
  SINCE JUL 1      2.9                       4.1   -1.2      4.9
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       35                        37     -2       57
  MONTH TO DATE  413                       415     -2      492
  SINCE DEC 1    413                       415     -2      492
  SINCE JUL 1   1856                      1671    185     1775

 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    16   HIGHEST WIND DIRECTION    NW (320)
  HIGHEST GUST SPEED    19   HIGHEST GUST DIRECTION    NW (310)
  AVERAGE WIND SPEED     9.3


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT SNOW
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           900 AM
 LOWEST     82           100 PM
 AVERAGE    91

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   35        67      1975
 MINIMUM TEMPERATURE (F)   21       -13      1903


SUNRISE AND SUNSET
DECEMBER 13 2014......SUNRISE   711 AM CST   SUNSET   421 PM CST
DECEMBER 14 2014......SUNRISE   712 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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