Monterrey to Alton, IL: time difference
Alton, IL is 1 h ahead of Monterrey. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Monterrey 18:13 6:13 PM Alton, IL 19:13 7:13 PM You –:–
18:13 6:13 PM
Central Standard Time · UTC-6
☀️ 06:43 · 🌙 18:10
19:13 7:13 PM
Central Daylight Time · UTC-5
☀️ 07:16 · 🌙 18:17
·
+1 h
Alton, IL is 1 h ahead of Monterrey.
When you, Monterrey and Alton, IL are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇲🇽 Monterrey
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇺🇸 Alton, IL
1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM
📍 Your time
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- Early
- Working hours
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Time zones side by side
| Detail | 🇲🇽 Monterrey | 🇺🇸 Alton, IL |
|---|---|---|
| Local time | 18:13 | 19:13 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Central Standard Time | Central Daylight Time |
| UTC offset | UTC-6 | UTC-5 |
| Offset from Monterrey | — | +1 h |
| IANA zone | America/Monterrey | America/Chicago |
| Daylight saving | Not observed | On summer time → UTC-6, Nov 1, 01:00 |
| Sunrise | 06:43 | 07:16 |
| Sunset | 18:10 | 18:17 |
| Daylight | 11 h 27 min | 11 h 1 min |
| People on this clock | 1,142,994 | 25,676 |
Compare Monterrey with another city
More comparisons with Monterrey: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Monterrey and Alton, IL: common questions
How far ahead of Monterrey is Alton, IL?
Alton is 1 hour ahead of Monterrey: UTC−5 against UTC−6.
If it is 9:00 AM in Monterrey, what time is it in Alton, IL?
At 9:00 AM in Monterrey, clocks in Alton show 10:00 AM.
What time is it in Alton, IL, at the end of the working day in Monterrey?
The working day in Monterrey ends at 6:00 PM; in Alton it is 7:00 PM at that moment.
Is there a time when both Monterrey and Alton, IL, are at work?
Yes: from 9:00 AM to 5:00 PM in Monterrey (10:00 AM to 6:00 PM in Alton), the working days (9:00 AM–6:00 PM) overlap.
When is it already the next day in Alton, IL?
From 11:00 PM in Monterrey it is already the next day in Alton. The other way round, until 1:00 AM in Alton it is still the previous day in Monterrey.
Does the time difference between Monterrey and Alton, IL, change?
Yes. The clocks change only in Alton. From November 1, 2026, Alton and Monterrey will have the same time.
