Climatological Report (Daily)
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000
CDUS43 KLOT 312235
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
434 PM CST SAT DEC 31 2016


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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR DECEMBER 31 2016...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2016


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         40    953 AM  68    1875  32      8       28
  MINIMUM         33    359 PM -10    1967  17     16       22
  AVERAGE         37                        24     13       25

PRECIPITATION (IN)
  TODAY            0.00          0.89 1978   0.06  -0.06      T
  MONTH TO DATE    1.77                      2.25  -0.48     4.87
  SINCE DEC 1      1.77                      2.25  -0.48     4.87
  SINCE JAN 1     35.97                     36.89  -0.92    39.85

SNOWFALL (IN)
  TODAY            0.0           7.6  1978   0.3   -0.3       T
  MONTH TO DATE   17.7                       8.5    9.2      4.5
  SINCE DEC 1     17.7                       8.5    9.2      4.5
  SINCE JUL 1     17.7                       9.9    7.8     15.7

DEGREE DAYS
 HEATING
  TODAY           28                        40    -12       40
  MONTH TO DATE 1226                      1153     73      800
  SINCE DEC 1   1226                      1155     71      800
  SINCE JUL 1   2055                      2411   -356     1773

 COOLING
  TODAY            0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1   1157                       843    314      806
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    25   HIGHEST WIND DIRECTION    SW (210)
  HIGHEST GUST SPEED    36   HIGHEST GUST DIRECTION    SW (210)
  AVERAGE WIND SPEED    16.5


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.9


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    59          1200 PM
 LOWEST     48           300 AM
 AVERAGE    54

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


THE CHICAGO-OHARE IL CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   32        65      1876
 MINIMUM TEMPERATURE (F)   17       -10      1969


SUNRISE AND SUNSET
DECEMBER 31 2016......SUNRISE   720 AM CST   SUNSET   430 PM CST
JANUARY  1 2017.......SUNRISE   720 AM CST   SUNSET   431 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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