Climatological Report (Monthly)
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492
CXUS43 KLOT 011401
CLMDPA


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
858 AM CDT SUN OCT 1 2017

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

...THE DU PAGE  AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 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              95   09/02/2008
 LOW               32   09/24/2012
HIGHEST            94   09/23        MM      MM       92
                        09/22
LOWEST             42   09/30        MM      MM       47
                        09/10
AVG. MAXIMUM     79.4              75.6     3.8     78.3
AVG. MINIMUM     53.1              52.9     0.2     58.5
MEAN             66.2              64.2     2.0     68.4

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        12.26   2008
 MINIMUM         0.39   2004
TOTALS           0.30R             3.29   -2.99     0.91

DEGREE_DAYS
HEATING TOTAL      83               102     -19       27
 SINCE 7/1         95               111     -16       28
COOLING TOTAL     129                79      50      139
 SINCE 1/1        679               803    -124      985
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.7
HIGHEST WIND SPEED/DIRECTION    23/300    DATE  09/26
HIGHEST GUST SPEED/DIRECTION    33/220    DATE  09/04

AVERAGE RH (PERCENT)     69


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

$$



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