Climatological Report (Daily)
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CDUS43 KLOT 160632
CLIPWK


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1232 AM CST SAT DEC 16 2017


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

...THE CHICAGO EXECUTIVE CLIMATE SUMMARY FOR DECEMBER 15 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1996 TO 2017


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         38   1159 PM  58    2011  35      3       11
  MINIMUM         23   1221 AM  -1    2016  21      2       -1
  AVERAGE         31                        28      3        5

PRECIPITATION (IN)
  YESTERDAY        0.00          0.36 2012   0.04  -0.04     0.00
  MONTH TO DATE    0.27                      0.98  -0.71     0.85
  SINCE DEC 1      0.27                      0.98  -0.71     0.85
  SINCE JAN 1     42.26                     32.50   9.76    33.08

DEGREE DAYS
 HEATING
  YESTERDAY       34                        37     -3       60
  MONTH TO DATE  483                       523    -40      598
  SINCE DEC 1    483                       523    -40      598
  SINCE JUL 1   1559                      1793   -234     1452

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    829                       789     40     1071
..................................................................


WIND (MPH)
  RESULTANT WIND SPEED   9   RESULTANT WIND DIRECTION   W (260)
  HIGHEST WIND SPEED    22   HIGHEST WIND DIRECTION     W (290)
  HIGHEST GUST SPEED    31   HIGHEST GUST DIRECTION     W (280)
  AVERAGE WIND SPEED    10.5



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


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


THE CHICAGO EXECUTIVE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   35        55      2006
 MINIMUM TEMPERATURE (F)   21         4      2013


SUNRISE AND SUNSET
DECEMBER 16 2017......SUNRISE   714 AM CST   SUNSET   421 PM CST
DECEMBER 17 2017......SUNRISE   714 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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