Climatological Report (Daily)
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CDUS43 KLOT 092251
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
448 PM CST SAT DEC 9 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR DECEMBER 9 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         32   1204 AM  62    1879  37     -5       25
  MINIMUM         28    359 PM -14    1876  22      6       18
  AVERAGE         30                        29      1       22

PRECIPITATION (IN)
  TODAY            0.03          1.47 2008   0.08  -0.05      T
  MONTH TO DATE    0.20                      0.80  -0.60     0.51
  SINCE DEC 1      0.20                      0.80  -0.60     0.51
  SINCE JAN 1     42.71                     35.44   7.27    34.71

SNOWFALL (IN)
  TODAY            0.5           5.1  1931   0.2    0.3       T
  MONTH TO DATE    0.5                       1.9   -1.4      6.4
  SINCE DEC 1      0.5                       1.9   -1.4      6.4
  SINCE JUL 1      0.6                       3.3   -2.7      6.4

DEGREE DAYS
 HEATING
  TODAY           35                        36     -1       43
  MONTH TO DATE  252                       306    -54      314
  SINCE DEC 1    252                       306    -54      314
  SINCE JUL 1   1295                      1562   -267     1143

 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    26   HIGHEST WIND DIRECTION    NW (320)
  HIGHEST GUST SPEED    33   HIGHEST GUST DIRECTION    NW (320)
  AVERAGE WIND SPEED    16.2


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  LIGHT SNOW
  FOG
  HAZE


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    85           500 AM
 LOWEST     58           300 PM
 AVERAGE    72

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   36        62      1879
 MINIMUM TEMPERATURE (F)   22        -8      1978
                                             1919


SUNRISE AND SUNSET
DECEMBER  9 2017......SUNRISE   708 AM CST   SUNSET   420 PM CST
DECEMBER 10 2017......SUNRISE   709 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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