Climatological Report (Monthly)
Issued by NWS Chicago, IL

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CXUS53 KLOT 011245
CLMLOT


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
628 AM CST SUN JAN 1 2017

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

...THE ROMEOVILLE  WFO CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1992 TO 2016

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              71   12/03/2012
 LOW              -12   12/19/2016
                        12/18/2016
                        03/08/2000
HIGHEST            54   12/26                         62
LOWEST            -12R  12/19                         16
                        12/18
AVG. MAXIMUM     30.8              34.7    -3.9     44.7
AVG. MINIMUM     17.9              20.0    -2.1     33.1
MEAN             24.4              27.4    -3.0     38.9

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.85   2015
 MINIMUM         0.58   1995
TOTALS           1.52              2.25   -0.73     5.85
DAILY AVG.       0.05              0.07   -0.02     0.19
DAYS >= .01         9              10.9    -1.9       14
DAYS >= .10         4               5.5    -1.5       11
DAYS >= .50         1               1.4    -0.4        3
DAYS >= 1.00        0               0.4    -0.4        1
GREATEST
 24 HR. TOTAL    0.55   12/04 TO 12/04

SNOWFALL (INCHES)
RECORDS
 TOTAL           30.0   2000
TOTALS           17.2               9.3     7.9      5.9
SINCE 7/1        17.2              10.2     7.0     10.6
SNOWDEPTH AVG.      3                MM      MM        0
DAYS >= 1.0         5               3.2     1.8
GREATEST
 SNOW DEPTH         7   12/21
                        12/20
                        12/19
 24 HR TOTAL      8.1   12/04 TO 12/04

DEGREE_DAYS
HEATING TOTAL    1253              1167      86      799
 SINCE 7/1       2109              2386    -277     1801
COOLING TOTAL       0                 0       0        0
 SINCE 1/1       1145               862     283      814
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              10.5
HIGHEST WIND SPEED/DIRECTION    29/MM     DATE   MM
HIGHEST GUST SPEED/DIRECTION    39/MM     DATE   MM

AVERAGE RH (PERCENT)     87


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

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