Climatological Report (Daily)
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422
CDUS43 KLOT 100636
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1234 AM CST SUN DEC 10 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 9 2017...

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)
 YESTERDAY
  MAXIMUM         32   1204 AM  62    1879  37     -5       25
  MINIMUM         20   1159 PM -14    1876  22     -2       18
  AVERAGE         26                        29     -3       22

PRECIPITATION (IN)
  YESTERDAY        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)
  YESTERDAY        0.6           5.1  1931   0.2    0.4       T
  MONTH TO DATE    0.6                       1.9   -1.3      6.4
  SINCE DEC 1      0.6                       1.9   -1.3      6.4
  SINCE JUL 1      0.7                       3.3   -2.6      6.4
  SNOW DEPTH       1

DEGREE DAYS
 HEATING
  YESTERDAY       39                        36      3       43
  MONTH TO DATE  256                       306    -50      314
  SINCE DEC 1    256                       306    -50      314
  SINCE JUL 1   1299                      1562   -263     1143

 COOLING
  YESTERDAY        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    13.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.8


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    85           500 AM
 LOWEST     57           600 PM
 AVERAGE    71

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


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


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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