Santiago to Longmont, CO: time difference
Longmont, CO is 3 h behind Santiago. 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.
Santiago 13:43 1:43 PM Longmont, CO 10:43 10:43 AM You –:–
13:43 1:43 PM
Chile Summer Time · UTC-3
☀️ 06:57 · 🌙 19:59
10:43 10:43 AM
Mountain Daylight Time · UTC-6
☀️ 07:16 · 🌙 18:16
·
−3 h
Longmont, CO is 3 h behind Santiago.
When you, Santiago and Longmont, CO are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇨🇱 Santiago
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
🇺🇸 Longmont, CO
21 9 PM 22 10 PM 23 11 PM 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇨🇱 Santiago | 🇺🇸 Longmont, CO |
|---|---|---|
| Local time | 13:43 | 10:43 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | Chile Summer Time | Mountain Daylight Time |
| UTC offset | UTC-3 | UTC-6 |
| Offset from Santiago | — | −3 h |
| IANA zone | America/Santiago | America/Denver |
| Daylight saving | On summer time → UTC-4, Apr 3, 23:00 | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 06:57 | 07:16 |
| Sunset | 19:59 | 18:16 |
| Daylight | 13 h 2 min | 11 h |
| People on this clock | 6,139,087 | 94,341 |
Compare Santiago with another city
More comparisons with Santiago: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Santiago and Longmont, CO: common questions
How far behind Santiago is Longmont, CO?
Longmont is 3 hours behind Santiago: UTC−6 against UTC−3.
What time is it in Longmont, CO, when it is 9:00 AM in Santiago?
When it is 9:00 AM in Santiago, it is 6:00 AM in Longmont.
What time is it in Longmont, CO, when it is 6:00 PM in Santiago?
When it is 6:00 PM in Santiago, it is 3:00 PM in Longmont.
When is a good time to call Longmont, CO, from Santiago?
Between 12:00 PM and 6:00 PM in Santiago – that is 9:00 AM to 3:00 PM in Longmont – both places are within working hours (9:00 AM–6:00 PM).
Until what time in Santiago is it still yesterday in Longmont, CO?
Before 3:00 AM in Santiago, the date in Longmont has not changed yet. From 9:00 PM in Longmont, it is already the next day in Santiago.
Does the time difference between Santiago and Longmont, CO, change?
Yes. Both places change their clocks, but on different dates. From November 1, 2026, Longmont will be 4 hours behind Santiago.
