Climatological Report (Monthly)
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CXUS43 KLOT 011255
CLMDPA


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

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

...THE DU PAGE  AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1997 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              69   12/03/2012
 LOW              -15   12/19/2016
HIGHEST            64   12/04        MM      MM       51
LOWEST             -8   12/27        MM      MM      -15
AVG. MAXIMUM     32.8              35.2    -2.4     30.4
AVG. MINIMUM     16.6              19.1    -2.5     17.2
MEAN             24.7              27.2    -2.5     23.8

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.10   2015
 MINIMUM         0.58   2014
TOTALS           0.63              1.72   -1.09     1.14

DEGREE_DAYS
HEATING TOTAL    1240              1173      67     1268
 SINCE 7/1       2450              2427      23     2179
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        695               814    -119     1007
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              10.2
HIGHEST WIND SPEED/DIRECTION    37/260    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    53/270    DATE  12/05

AVERAGE RH (PERCENT)     73


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

$$



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