Climatological Report (Daily)
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198
CDUS43 KLOT 172139
CLIDPA

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
439 PM CDT FRI OCT 17 2025

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

...THE DUPAGE AIRPORT CLIMATE SUMMARY FOR OCTOBER 17 2025...
VALID TODAY AS OF 0400 PM LOCAL TIME.

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1997 TO 2025


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
...................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         76   2:59 PM  83    2016  62     14       65
  MINIMUM         55   3:44 AM  28    2004  42     13       30
  AVERAGE         66                        52     14       48

PRECIPITATION (IN)
  TODAY            0.00          3.05 1998   0.10  -0.10     0.00
  MONTH TO DATE    1.85                      1.76   0.09     0.13
  SINCE SEP 1      2.49                      4.76  -2.27     1.55
  SINCE JAN 1     23.02                     28.13  -5.11    25.87

DEGREE DAYS
 HEATING
  TODAY            0                        13    -13       17
  MONTH TO DATE   73                       177   -104      136
  SINCE SEP 1    120                       277   -157      169
  SINCE JUL 1    131                       288   -157      178

 COOLING
  TODAY            1                         0      1        0
  MONTH TO DATE   48                         9     39        3
  SINCE SEP 1    175                        97     78      113
  SINCE JAN 1   1083                       821    262      911
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    20   HIGHEST WIND DIRECTION     S (180)
  HIGHEST GUST SPEED    27   HIGHEST GUST DIRECTION     S (200)
  AVERAGE WIND SPEED    11.1


WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    69           6:00 AM
 LOWEST     50           2:00 PM
 AVERAGE    60

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


THE DUPAGE AIRPORT CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   62        78      2007
 MINIMUM TEMPERATURE (F)   41        27      2015


SUNRISE AND SUNSET
OCTOBER 17 2025.......SUNRISE   7:08 AM CDT   SUNSET   6:08 PM CDT
OCTOBER 18 2025.......SUNRISE   7:09 AM CDT   SUNSET   6:06 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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