Koster in numbers
- Coordinates
- 41.0917, -87.6850
- Elevation
- 193 m above sea level
- Region
- Illinois
- Country
- United States, North America
- Capital
- Washington, D.C. — 939 km away
- Same name
- 4 more places in the world share this name
What time is it in Koster, Illinois, United States
The page gives the present local time in Koster, Illinois, United States, whose time zone is America/Chicago (−5).
Koster, United States
Monday, 19 October 2026
UTC−5 · America/Chicago
Local time in Koster
UTC−5 · daylight saving time is active
Local time in Koster, Illinois.
The sun today
Sunrise 7:08 AM Solar noon 12:37 PM Sunset 6:06 PM Daylight 10 h 58 min Night 13 h 02 min Civil twilight 6:40 AM – 6:34 PM
Weather in Koster right now
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Weather data by Open-Meteo, updated every 30 minutes.
Koster and its neighbours
Postal codes
- 60964 Saint Anne — 5.3 km away
- 60944 Hopkins Park — 5.9 km away
- 60954 Momence — 7.9 km away
- 60958 Pembroke Township — 8.4 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 Koster
- Koster North West, South Africa
- Koster Zealand, Denmark
- Koster Chelyabinsk, Russia
- Koster Chuvash Republic, Russia
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
- Collins (historical) — 3.1 km
- Wichert — 4.1 km
- Tallmadge — 5.5 km
- Doney — 5.7 km
- Sun River Terrace — 5.8 km
- Hopkins Park — 5.9 km
Local time details for Koster
Koster includes 4 postal codes.
Koster sets its clocks by America/Chicago, which runs UTC−5. Daylight saving time here: Yes.
Sunrise comes to Koster at 7:08 AM and sunset at 6:06 PM today. Together that makes 10 h 58 min of light.
The same local time applies in Koster, Collins (historical) and Wichert.
Questions and answers
- What time zone is Koster in?
- Koster is in the America/Chicago time zone, with an offset of −5.
- Do clocks in Koster shift for daylight saving time?
- Yes.
- What is the local sunrise time in Koster?
- Local sunrise is 7:08 AM.