Current Time in O'Fallon, Illinois, USA
12:14:09 AM
00:14:09
CST (Central Standard Time) · UTC−06:00
America/Chicago
Time zone details
O'Fallon is currently on standard time; daylight saving time is observed in 2026
Daylight in O'Fallon
Location facts
Place
- Country
- USA
- State
- Illinois
- County
- Saint Clair County
- Place type
- Populated place
- Country currency
- US Dollar (USD)
Practical
- Country languages
- English, Spanish, Hawaiian, French
- Dialing code
- +1
- Population
- 29,002
- Elevation
- 167 m
Geography
- Geographic coordinates
- 38° 35' N / 89° 54' W
Convert O'Fallon time
Compare O'Fallon with another city or time zone
O'Fallon follows the same clock and daylight-saving rules as Chicago
Popular conversions (current offsets)
All times shown relative to O'Fallon local time
Clock changes in O'Fallon
2:00 AM CST3:00 AM CDT
Clocks move forward 1 hour
2026
past
Daylight saving time starts
2:00 AM CST3:00 AM CDT
Clocks move forward 1 hour
past
Daylight saving time ends
2:00 AM CDT1:00 AM CST
Clocks move back 1 hour
Future clock changes, 2027–2030
Sun & Moon details
Sun
- Sunrise
- Solar noon
- Sunset
- Daylight duration
- 10 hr 14 min2 min shorter than the previous day
Twilight
- Civil twilight
- –
- Nautical twilight
- –
- Astronomical twilight
- –
View full Sun & Moon detailsHide full Sun & Moon details
Tuesday, November 10, 2026
View O'Fallon on Savvy Time's time-zone map
Sun
- Sunrise
- Sunset
- Day length
- 10 hr 14 min2 min shorter than the previous day
- Solar noon
- (34.1° altitude)
Civil twilight
- Dawn to dusk
- –
Additional twilight
- Nautical dawn to dusk
- –
- Astronomical dawn to dusk
- –
Moon
- Phase
- New Moon (2% 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
| Local date | Sunrise | Sunset | Day length | Daily change |
|---|---|---|---|---|
| 10 hr 14 min | 2 min shorter than the previous day | |||
| 10 hr 12 min | 1 min 58 sec shorter than the previous day | |||
| 10 hr 10 min | 1 min 56 sec shorter than the previous day | |||
| 10 hr 08 min | 1 min 55 sec shorter than the previous day | |||
| 10 hr 06 min | 1 min 53 sec shorter than the previous day | |||
| 10 hr 05 min | 1 min 51 sec shorter than the previous day | |||
| 10 hr 03 min | 1 min 49 sec shorter than the previous day |
Weather forecast for O'Fallon
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Plan around O'Fallon
Upcoming public holidays in Illinois
- Veterans Day
- Thanksgiving Day
- Christmas Day
Nearby scheduled airports for O'Fallon, Illinois, USA
Scott AFB/Midamerica AirportBLVMedium airport · Serves Belleville8.4 km southeast
Source: OurAirports record · BLV / KBLV
About 8.4 km (5.2 mi) southeast of O'Fallon
Scheduled airline service in source data
St. Louis Lambert International AirportSTLLarge airport · Serves St Louis43.5 km west-northwest
Source: OurAirports record · STL / KSTL
About 43.5 km (27.0 mi) west-northwest of O'Fallon
Scheduled airline service in source data
Veterans Airport of Southern IllinoisMWAMedium airport · Serves Marion122 km southeast
Source: OurAirports record · MWA / KMWA
About 122 km (75.7 mi) southeast of O'Fallon
Scheduled airline service in source data
Nearby places
Frequently asked questions
- What time zone is O'Fallon in?
- O'Fallon 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 O'Fallon?
- Clocks in O'Fallon 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 O'Fallon observe daylight saving time?
- Yes. O'Fallon observes daylight saving time: CDT (UTC−5) in summer and CST (UTC−6) in winter.
- What is the UTC offset of O'Fallon?
- O'Fallon is UTC−6 in winter and UTC−5 in summer