Climatological Report (Daily)
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921
CDUS43 KLOT 170633
CLIDPA

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
133 AM CDT THU SEP 17 2026

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

...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 16 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1997 TO 2026


WEATHER ITEM   OBSERVED RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   VALUE       VALUE  FROM      YEAR
                                           NORMAL
............................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         75     89    2018  76     -1       86
                               2024
  MINIMUM         63     39    2000  54      9       56
  AVERAGE         69                 65      4       71

PRECIPITATION (IN)
  YESTERDAY        T      0.11 2023   0.10  -0.10     0.00
  MONTH TO DATE    0.16               1.59  -1.43     0.34
  SINCE SEP 1      0.16               1.59  -1.43     0.34
  SINCE JAN 1     29.30              24.96   4.34    20.87

DEGREE DAYS
 HEATING
  YESTERDAY        0                  3     -3        0
  MONTH TO DATE   10                 28    -18       47
  SINCE SEP 1     10                 28    -18       47
  SINCE JUL 1     11                 39    -28       58

 COOLING
  YESTERDAY        4                  3      1        6
  MONTH TO DATE  139                 63     76       44
  SINCE SEP 1    139                 63     76       44
  SINCE JAN 1    820                787     33      952
............................................................


WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           9:00 PM
 LOWEST     64          10:00 AM
 AVERAGE    79

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


THE DUPAGE AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   75        92      2018
 MINIMUM TEMPERATURE (F)   53        40      1999


SUNRISE AND SUNSET
SEPTEMBER 17 2026.....SUNRISE   6:35 AM CDT   SUNSET   6:59 PM CDT
SEPTEMBER 18 2026.....SUNRISE   6:36 AM CDT   SUNSET   6:57 PM CDT


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




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