Current Time in Oak Brook, DuPage County, Illinois, USA

2:37:29 AM

02:37:29

CST (Central Standard Time) · UTC−06:00

America/Chicago

Clock format
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Time zone details

Oak Brook is currently on standard time; daylight saving time is observed in 2026

Daylight in Oak Brook

Sunrise6:40 AMSolar noon11:36 AMSunset4:31 PM
Next clock changeMar 14, 2027 · Clocks move forward 1 hour · in 119 daysUpcomingView detailsWeather nowLoading current forecast…Forecast details

Location facts

Place

Country
USA
State
Illinois
County
DuPage County
Place type
Populated place
Country currency
US Dollar (USD)

Practical

Country languages
English, Spanish, Hawaiian, French
Dialing code
+1
Population
8,091
Elevation
202 m

Geography

Geographic coordinates
41° 49' N / 87° 55' W
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Clock changes in Oak Brook

Next clock change

Upcoming

2:00 AM CST3:00 AM CDT

Clocks move forward 1 hour

2026

  1. past

    Daylight saving time starts

    2:00 AM CST3:00 AM CDT

    Clocks move forward 1 hour

  2. past

    Daylight saving time ends

    2:00 AM CDT1:00 AM CST

    Clocks move back 1 hour

Future clock changes, 2027–2030
USA daylight saving timeClock changes worldwide

Sun & Moon details

Sun

Sunrise
Solar noon
Sunset
Daylight duration
9 hr 52 min2 min 8 sec shorter than the previous day

Twilight

Civil twilight
–
Nautical twilight
–
Astronomical twilight
–
Waxing CrescentMoon illumination25%
View full Sun & Moon detailsHide full Sun & Moon details

Saturday, November 14, 2026

View Oak Brook on Savvy Time's time-zone map

Sun

Sunrise
Sunset
Day length
9 hr 52 min2 min 8 sec shorter than the previous day
Solar noon
(29.8° altitude)

Civil twilight

Dawn to dusk
–

Additional twilight

Nautical dawn to dusk
–
Astronomical dawn to dusk
–

Moon

Phase
Waxing Crescent (25% illuminated)
Moonrise
Moonset
Previous principal phase
New Moon — Monday, November 9, 2026 at
Next principal phase
First Quarter — Tuesday, November 17, 2026 at

Seven-day daylight outlook

Sunrise, sunset, and daylight for seven local dates
Local dateSunriseSunsetDay lengthDaily change
9 hr 52 min2 min 8 sec shorter than the previous day
9 hr 49 min2 min 6 sec shorter than the previous day
9 hr 47 min2 min 3 sec shorter than the previous day
9 hr 45 min2 min 1 sec shorter than the previous day
9 hr 43 min1 min 59 sec shorter than the previous day
9 hr 41 min1 min 57 sec shorter than the previous day
9 hr 40 min1 min 54 sec shorter than the previous day

Weather forecast for Oak Brook

Temperature unit

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Plan around Oak Brook

Upcoming public holidays in Illinois

  1. Thanksgiving Day
  2. Christmas Day
  3. New Year's Day

Nearby places

HinsdaleDuPage County4 kmSWestchesterCook County4 kmNEWestmontDuPage County6 kmSWLa GrangeCook County6 kmSEBrookfieldCook County6 kmEBellwoodCook County7 kmNEDowners GroveDuPage County7 kmWElmhurstDuPage County7 kmNVilla ParkDuPage County8 kmNWLombardDuPage County8 kmNWMaywoodCook County9 kmNEMelrose ParkCook County10 kmNE
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Frequently asked questions

What time zone is Oak Brook in?
Oak Brook uses Central Standard Time (CST, UTC−6) in winter and Central Daylight Time (CDT, UTC−5) in summer. Its IANA time zone is America/Chicago.
When is the next clock change in Oak Brook?
Clocks in Oak Brook move forward 1 hour on Sunday, March 14, 2027 at 2:00 AM, changing from CST (UTC−06:00) to CDT (UTC−05:00)
Does Oak Brook observe daylight saving time?
Yes. Oak Brook observes daylight saving time: CDT (UTC−5) in summer and CST (UTC−6) in winter.
What is the UTC offset of Oak Brook?
Oak Brook is UTC−6 in winter and UTC−5 in summer