Climatological Report (Daily)
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000
CDUS43 KLOT 102243
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
441 PM CST SUN DEC 10 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR DECEMBER 10 2017...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         35    103 PM  62    1879  36     -1       23
  MINIMUM         20    102 AM  -8    1978  22     -2       18
                                      1919
  AVERAGE         28                        29     -1       21

PRECIPITATION (IN)
  TODAY            0.00          2.18 1971   0.08  -0.08     0.12
  MONTH TO DATE    0.20                      0.88  -0.68     0.63
  SINCE DEC 1      0.20                      0.88  -0.68     0.63
  SINCE JAN 1     42.71                     35.52   7.19    34.83

SNOWFALL (IN)
  TODAY            0.0          10.9  1934   0.3   -0.3      2.7
  MONTH TO DATE    0.6                       2.2   -1.6      9.1
  SINCE DEC 1      0.6                       2.2   -1.6      9.1
  SINCE JUL 1      0.7                       3.6   -2.9      9.1

DEGREE DAYS
 HEATING
  TODAY           37                        36      1       44
  MONTH TO DATE  293                       342    -49      358
  SINCE DEC 1    293                       342    -49      358
  SINCE JUL 1   1336                      1598   -262     1187

 COOLING
  TODAY            0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    991                       843    148     1157
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    18   HIGHEST WIND DIRECTION    SW (240)
  HIGHEST GUST SPEED    24   HIGHEST GUST DIRECTION     W (250)
  AVERAGE WIND SPEED    10.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    73          1200 AM
 LOWEST     56           100 PM
 AVERAGE    65

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   36        61      1949
 MINIMUM TEMPERATURE (F)   22        -5      1972


SUNRISE AND SUNSET
DECEMBER 10 2017......SUNRISE   709 AM CST   SUNSET   420 PM CST
DECEMBER 11 2017......SUNRISE   710 AM CST   SUNSET   420 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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