Monterrey to Port Arthur, TX: time difference
Port Arthur, TX 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 07:41 7:41 AM Port Arthur, TX 08:41 8:41 AM You –:–
07:41 7:41 AM
Central Standard Time · UTC-6
☀️ 06:43 · 🌙 18:11
08:41 8:41 AM
Central Daylight Time · UTC-5
☀️ 07:21 · 🌙 18:42
·
+1 h
Port Arthur, TX is 1 h ahead of Monterrey.
When you, Monterrey and Port Arthur, TX 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
🇺🇸 Port Arthur, TX
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
- Asleep
- Early
- Working hours
- Evening
- Both working
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Time zones side by side
| Detail | 🇲🇽 Monterrey | 🇺🇸 Port Arthur, TX |
|---|---|---|
| Local time | 07:41 | 08:41 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 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 | 07:21 |
| Sunset | 18:11 | 18:42 |
| Daylight | 11 h 29 min | 11 h 21 min |
| People on this clock | 1,142,994 | 54,135 |
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 Port Arthur, TX: common questions
How many hours ahead of Monterrey is Port Arthur, TX?
The clocks in Port Arthur are 1 hour ahead of those in Monterrey (UTC−5 and UTC−6).
What time is it in Port Arthur, TX, at the start of the working day in Monterrey?
The working day in Monterrey starts at 9:00 AM; in Port Arthur it is 10:00 AM at that moment.
What time is it in Port Arthur, TX, when it is 6:00 PM in Monterrey?
When it is 6:00 PM in Monterrey, it is 7:00 PM in Port Arthur.
Is there a time when both Monterrey and Port Arthur, TX, are at work?
Yes: from 9:00 AM to 5:00 PM in Monterrey (10:00 AM to 6:00 PM in Port Arthur), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Port Arthur, TX, compared with Monterrey?
The new day starts in Port Arthur earlier: at 11:00 PM in Monterrey it is already midnight there. Until 1:00 AM in Port Arthur, Monterrey is still on the previous day.
Does the time difference between Monterrey and Port Arthur, TX, change?
Yes. The clocks change only in Port Arthur. From November 1, 2026, Port Arthur and Monterrey will have the same time.
