Climatological Report (Daily)
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CDUS43 KLOT 210634
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1233 AM CST SUN DEC 21 2014


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 20 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         33    306 PM  67    1877  33      0       36
  MINIMUM         28   1237 AM  -9    1963  19      9       33
  AVERAGE         31                        26      5       35

PRECIPITATION (IN)
  YESTERDAY        T             1.67 1895   0.06  -0.06     0.31
  MONTH TO DATE    0.28                      1.58  -1.30     1.07
  SINCE DEC 1      0.28                      1.58  -1.30     1.07
  SINCE JAN 1     38.96                     36.22   2.74    41.22

SNOWFALL (IN)
  YESTERDAY        T            11.0  1960   0.3   -0.3      0.0
                                      2002
  MONTH TO DATE    T                         4.9   -4.9      9.3
  SINCE DEC 1      T                         4.9   -4.9      9.3
  SINCE JUL 1      2.9                       6.3   -3.4     10.2
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       34                        39     -5       30
  MONTH TO DATE  651                       717    -66      811
  SINCE DEC 1    651                       717    -66      811
  SINCE JUL 1   2094                      1973    121     2094

 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    10   HIGHEST WIND DIRECTION    SW (230)
  HIGHEST GUST SPEED    14   HIGHEST GUST DIRECTION     W (250)
  AVERAGE WIND SPEED     3.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 1.0


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    78           100 AM
 LOWEST     66           100 PM
 AVERAGE    72

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   33        62      1967
 MINIMUM TEMPERATURE (F)   19       -14      1989


SUNRISE AND SUNSET
DECEMBER 21 2014......SUNRISE   716 AM CST   SUNSET   423 PM CST
DECEMBER 22 2014......SUNRISE   717 AM CST   SUNSET   424 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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