983
CXUS53 KLOT 011008
CLMPWK

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
508 AM CDT THU OCT 01 2026

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

...THE CHICAGO EXECUTIVE AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1996 TO 2026

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             96   09/22/2017
                       09/10/2013
 LOW              34   09/24/2012
HIGHEST           96R  09/02                          89  09/29
LOWEST            47   09/26                          46  09/07
                       09/27
                                                          09/08
AVG. MAXIMUM    76.3               75.3     1.0     78.8
AVG. MINIMUM    60.7               56.3     4.4     57.7
MEAN            68.5               65.8     2.7     68.3
DAYS MAX >= 90     3                1.7     1.3        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.0     0.0        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        9.43   2008
 MINIMUM        0.31   2004
TOTALS            MM               3.04      MM     1.70
DAILY AVG.        MM               0.10      MM     0.06
DAYS >= .01       MM                9.5      MM        5
DAYS >= .10       MM                5.4      MM        4
DAYS >= .50        3                1.7     1.3        1
DAYS >= 1.00       1                0.7     0.3        1
GREATEST
 24 HR. TOTAL   1.21   09/19 TO 09/20               1.29

DEGREE DAYS
HEATING TOTAL     40                 82     -42       34
 SINCE 7/1        40                 89     -49       MM
COOLING TOTAL    151                106      45      140
 SINCE 1/1       943                920      23       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.7
HIGHEST WIND SPEED/DIRECTION    21/200    DATE  09/08
HIGHEST GUST SPEED/DIRECTION    32/060    DATE  09/20

AVERAGE RH (PERCENT)     75

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              6     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       5
LIGHT RAIN               14     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      1
HAZE                      0

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

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