O'Fallon in numbers
- Coordinates
- 38.5923, -89.9112
- Population
- 29 002
- Region
- Illinois
- Country
- United States, North America
- Capital
- Washington, D.C. — 1116 km away
- Same name
- 2 more places in the world share this name
What time is it in O'Fallon, Illinois, United States
Check the current local time in O'Fallon, Illinois, United States, which sits in the America/Chicago time zone (−5).
O'Fallon, United States
Saturday, 24 October 2026
UTC−5 · America/Chicago
Local time in O'Fallon
UTC−5 · daylight saving time is active
O'Fallon keeps America/Chicago clock_time.
The sun today
Sunrise 7:19 AM Solar noon 12:45 PM Sunset 6:11 PM Daylight 10 h 52 min Night 13 h 08 min Civil twilight 6:52 AM – 6:38 PM
Weather in O'Fallon right now
Loading the current weather…
Weather data by Open-Meteo, updated every 30 minutes.
O'Fallon and its neighbours
Postal codes
- 62269 O Fallon — 2.6 km away
- 62221 Belleville — 7.1 km away
- 62225 Scott Air Force Base — 7.1 km away
- 62208 Fairview Heights — 8.3 km away
- 62254 Lebanon — 9.8 km away
- 62226 Belleville — 10.0 km away
- 62232 Caseyville — 10.1 km away
- 62220 Belleville — 10.9 km away
- 62234 Collinsville — 12.0 km away
- 62281 Saint Jacob — 16.3 km away
Postal codes come from the free GeoNames dataset. Where a code is listed with a distance, it belongs to a nearby settlement — GeoNames spells that name differently from ours.
Largest cities in Illinois
Other places named O'Fallon
Same time zone — America/Chicago
- Chicago United States
- Houston United States
- San Antonio United States
- Dallas United States
- Fort Worth United States
- Austin United States
Nearby places
- Petersburg — 0.9 km
- Glenview — 2.3 km
- Carbon — 2.4 km
- Shiloh — 3.6 km
- Crossroads — 4.8 km
- Furman — 4.9 km
About the time in O'Fallon
Addresses in O'Fallon fall under 10 postal codes.
Hours in O'Fallon are kept by America/Chicago, standing at UTC−5. Daylight saving observed: Yes.
The horizon brightens over O'Fallon at 7:19 AM, and the sun sets at 6:11 PM. Daylight runs 10 h 52 min.
The hour in O'Fallon is the hour in Petersburg and Glenview as well.
Questions and answers
- What time zone should be selected for O'Fallon?
- Select America/Chicago for O'Fallon; the offset is −5.
- Does O'Fallon observe daylight saving time?
- Yes.
- Both sunrise and sunset in O'Fallon — what times?
- 7:19 AM and 6:11 PM.