Climatological Report (Monthly)
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CXUS53 KLOT 011255
CLMMDW


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

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

...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

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

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              72   12/03/2012
 LOW              -20   12/24/1983
HIGHEST            65   12/04        MM      MM       55
LOWEST             -3   12/27        MM      MM       -6
AVG. MAXIMUM     35.2              35.3    -0.1     32.8
AVG. MINIMUM     21.7              22.7    -1.0     21.5
MEAN             28.5              29.0    -0.5     27.2

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.21   1982
 MINIMUM         0.50   1989
TOTALS           0.17R             2.57   -2.40     1.25

DEGREE_DAYS
HEATING TOTAL    1127              1116      11     1168
 SINCE 7/1       2110              2251    -141     1880
COOLING TOTAL       0                 0       0        0
 SINCE 1/1       1151              1045     106     1465
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              10.8
HIGHEST WIND SPEED/DIRECTION    39/260    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    50/270    DATE  12/05

AVERAGE RH (PERCENT)     64


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

$$



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