Climatological Report (Monthly)
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CXUS53 KLOT 011255
CLMPWK


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
641 AM CST MON JAN 1 2018

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

...THE CHICAGO EXECUTIVE CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

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

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              69   12/03/2012
                        12/05/2001
                        07/04/2012
 LOW               -8   12/22/2000
HIGHEST            65   12/04        MM      MM       53
LOWEST             -4   12/27        MM      MM       -8
AVG. MAXIMUM     34.5              35.1    -0.6     31.3
AVG. MINIMUM     20.1              20.9    -0.8     19.6
MEAN             27.3              28.0    -0.7     25.5

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.30   2008
 MINIMUM         0.39   2005
TOTALS           0.27R             1.83   -1.56     1.22

DEGREE_DAYS
HEATING TOTAL    1163              1147      16     1217
 SINCE 7/1       2239              2417    -178     2071
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        829               789      40     1071
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              9.0
HIGHEST WIND SPEED/DIRECTION    32/240    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    46/250    DATE  12/05

AVERAGE RH (PERCENT)     67


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

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