Climatological Report (Daily)
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203
CDUS43 KLOT 210634
CLIDPA

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
134 AM CDT MON SEP 21 2026

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

...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 20 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         69     93    2018  74     -5       79
                               2022
  MINIMUM         61     40    2003  52      9       62
                               2020
  AVERAGE         65                 63      2       71

PRECIPITATION (IN)
  YESTERDAY        1.06R  0.77 2001   0.11   0.95     0.21
  MONTH TO DATE    3.71               2.00   1.71     0.58
  SINCE SEP 1      3.71               2.00   1.71     0.58
  SINCE JAN 1     32.85              25.37   7.48    21.11

DEGREE DAYS
 HEATING
  YESTERDAY        0                  4     -4        0
  MONTH TO DATE   10                 43    -33       47
  SINCE SEP 1     10                 43    -33       47
  SINCE JUL 1     11                 54    -43       58

 COOLING
  YESTERDAY        0                  2     -2        6
  MONTH TO DATE  149                 72     77       72
  SINCE SEP 1    149                 72     77       72
  SINCE JAN 1    830                796     34      980
............................................................


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST   100           2:00 AM
 LOWEST     86           6:00 PM
 AVERAGE    93

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


THE DUPAGE AIRPORT CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   74        92      2017
                                             2024
 MINIMUM TEMPERATURE (F)   52        40      2006


SUNRISE AND SUNSET
SEPTEMBER 21 2026.....SUNRISE   6:39 AM CDT   SUNSET   6:52 PM CDT
SEPTEMBER 22 2026.....SUNRISE   6:40 AM CDT   SUNSET   6:50 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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