Climatological Report (Daily)
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970
CDUS43 KLOT 142245
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
444 PM CST THU DEC 14 2017


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR DECEMBER 14 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         27    225 PM  66    1975  35     -8       19
  MINIMUM         16    727 AM  -9    1901  21     -5        3
  AVERAGE         22                        28     -6       11

PRECIPITATION (IN)
  TODAY            T             1.43 2011   0.07  -0.07      T
  MONTH TO DATE    0.28                      1.19  -0.91     1.07
  SINCE DEC 1      0.28                      1.19  -0.91     1.07
  SINCE JAN 1     42.79                     35.83   6.96    35.27

SNOWFALL (IN)
  TODAY            T            10.0  1951   0.3   -0.3       T
  MONTH TO DATE    2.0                       3.2   -1.2     14.3
  SINCE DEC 1      2.0                       3.2   -1.2     14.3
  SINCE JUL 1      2.1                       4.6   -2.5     14.3

DEGREE DAYS
 HEATING
  TODAY           43                        37      6       54
  MONTH TO DATE  446                       489    -43      547
  SINCE DEC 1    446                       489    -43      547
  SINCE JUL 1   1489                      1745   -256     1376

 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    20   HIGHEST WIND DIRECTION     N (340)
  HIGHEST GUST SPEED    26   HIGHEST GUST DIRECTION     N (340)
  AVERAGE WIND SPEED    10.3


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.7


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED TODAY.
  LIGHT SNOW


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    74           500 AM
 LOWEST     42           300 PM
 AVERAGE    58

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   35        64      1971
 MINIMUM TEMPERATURE (F)   21       -12      1901


SUNRISE AND SUNSET
DECEMBER 14 2017......SUNRISE   712 AM CST   SUNSET   421 PM CST
DECEMBER 15 2017......SUNRISE   713 AM CST   SUNSET   421 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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