Climatological Report (Daily)
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CDUS43 KLOT 070632
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1231 AM CST THU DEC 7 2017


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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 6 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         35    316 PM  65    1980  38     -3       41
                                      1951
  MINIMUM         26   1046 PM   0    2007  24      2       25
                                      1972
                                      1885
  AVERAGE         31                        31      0       33

PRECIPITATION (IN)
  YESTERDAY        0.00          1.12 1998   0.08  -0.08     0.00
  MONTH TO DATE    0.16                      0.54  -0.38     0.50
  SINCE DEC 1      0.16                      0.54  -0.38     0.50
  SINCE JAN 1     42.67                     35.18   7.49    34.70

SNOWFALL (IN)
  YESTERDAY        0.0           5.6  1950   0.3   -0.3      0.0
  MONTH TO DATE    0.0                       1.3   -1.3      6.4
  SINCE DEC 1      0.0                       1.3   -1.3      6.4
  SINCE JUL 1      0.1                       2.7   -2.6      6.4
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       34                        34      0       32
  MONTH TO DATE  139                       200    -61      187
  SINCE DEC 1    139                       200    -61      187
  SINCE JUL 1   1182                      1456   -274     1016

 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    24   HIGHEST WIND DIRECTION     W (250)
  HIGHEST GUST SPEED    30   HIGHEST GUST DIRECTION     W (250)
  AVERAGE WIND SPEED    13.7


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.4


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    63           500 AM
 LOWEST     38           200 PM
 AVERAGE    51

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


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   37        64      1916
 MINIMUM TEMPERATURE (F)   23        -6      1882


SUNRISE AND SUNSET
DECEMBER  7 2017......SUNRISE   706 AM CST   SUNSET   420 PM CST
DECEMBER  8 2017......SUNRISE   707 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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