Climatological Report (Daily)
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483
CDUS43 KLOT 180636
CLIMDW


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1233 AM CST MON DEC 18 2017


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

...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR DECEMBER 17 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1928 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         47    352 PM  60    1977  35     12       26
  MINIMUM         32    243 AM  -7    1951  22     10       20
  AVERAGE         40                        28     12       23

PRECIPITATION (IN)
  YESTERDAY        0.00          0.44 1928   0.08  -0.08     0.04
  MONTH TO DATE    0.05                      1.52  -1.47     0.92
  SINCE DEC 1      0.05                      1.52  -1.47     0.92
  SINCE JAN 1     41.33                     38.04   3.29    32.28

DEGREE DAYS
 HEATING
  YESTERDAY       25                        37    -12       42
  MONTH TO DATE  520                       580    -60      670
  SINCE DEC 1    520                       580    -60      670
  SINCE JUL 1   1503                      1715   -212     1382

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1   1151                      1045    106     1465
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   1   RESULTANT WIND DIRECTION  SW (220)
  HIGHEST WIND SPEED    12   HIGHEST WIND DIRECTION    SW (220)
  HIGHEST GUST SPEED    15   HIGHEST GUST DIRECTION    SW (230)
  AVERAGE WIND SPEED     3.8



WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  FOG


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


THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   34        59      1939
 MINIMUM TEMPERATURE (F)   22        -9      1983


SUNRISE AND SUNSET
DECEMBER 18 2017......SUNRISE   713 AM CST   SUNSET   422 PM CST
DECEMBER 19 2017......SUNRISE   714 AM CST   SUNSET   423 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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