Climatological Report (Daily)
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000
CDUS43 KLOT 200635
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1235 AM CST SAT DEC 20 2014


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 19 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    547 PM  64    1877  34     -2       39
  MINIMUM         27    345 AM -14    1983  20      7       33
  AVERAGE         30                        26      4       36

PRECIPITATION (IN)
  YESTERDAY        T             2.66 1895   0.07  -0.07     0.06
  MONTH TO DATE    0.28                      1.52  -1.24     0.76
  SINCE DEC 1      0.28                      1.52  -1.24     0.76
  SINCE JAN 1     38.96                     36.16   2.80    40.91

SNOWFALL (IN)
  YESTERDAY        T             8.3  1973   0.3   -0.3      0.0
  MONTH TO DATE    T                         4.6   -4.6      9.3
  SINCE DEC 1      T                         4.6   -4.6      9.3
  SINCE JUL 1      2.9                       6.0   -3.1     10.2
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       35                        38     -3       29
  MONTH TO DATE  617                       678    -61      781
  SINCE DEC 1    617                       678    -61      781
  SINCE JUL 1   2060                      1934    126     2064

 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     N (340)
  HIGHEST GUST SPEED    11   HIGHEST GUST DIRECTION     N (340)
  AVERAGE WIND SPEED     4.8


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    81          1200 AM
 LOWEST     69          1000 AM
 AVERAGE    75

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   33        67      1877
 MINIMUM TEMPERATURE (F)   19        -9      1963


SUNRISE AND SUNSET
DECEMBER 20 2014......SUNRISE   716 AM CST   SUNSET   423 PM CST
DECEMBER 21 2014......SUNRISE   716 AM CST   SUNSET   423 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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