Seattle, WA to Longmont, CO: time difference
Longmont, CO is 1 h ahead of Seattle, WA. 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.
Seattle, WA 10:10 10:10 AM Longmont, CO 11:10 11:10 AM You –:–
10:10 10:10 AM
Pacific Daylight Time · UTC-7
☀️ 07:35 · 🌙 18:15
11:10 11:10 AM
Mountain Daylight Time · UTC-6
☀️ 07:16 · 🌙 18:16
·
+1 h
Longmont, CO is 1 h ahead of Seattle, WA.
When you, Seattle, WA 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
🇺🇸 Seattle, WA
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
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
- Right now
Time zones side by side
| Detail | 🇺🇸 Seattle, WA | 🇺🇸 Longmont, CO |
|---|---|---|
| Local time | 10:10 | 11:10 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | Pacific Daylight Time | Mountain Daylight Time |
| UTC offset | UTC-7 | UTC-6 |
| Offset from Seattle, WA | — | +1 h |
| IANA zone | America/Los Angeles | America/Denver |
| Daylight saving | On summer time → UTC-8, Nov 1, 01:00 | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 07:35 | 07:16 |
| Sunset | 18:15 | 18:16 |
| Daylight | 10 h 41 min | 11 h |
| People on this clock | 737,015 | 94,341 |
Compare Seattle, WA with another city
More comparisons with Seattle, WA: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Seattle, WA and Longmont, CO: common questions
What is the time difference between Seattle, WA, and Longmont, CO?
Longmont is 1 hour ahead: it uses UTC−6, while Seattle is on UTC−7.
What time is it in Longmont, CO, when it is 9:00 AM in Seattle, WA?
When it is 9:00 AM in Seattle, it is 10:00 AM in Longmont.
If it is 6:00 PM in Seattle, WA, what time is it in Longmont, CO?
At 6:00 PM in Seattle, clocks in Longmont show 7:00 PM.
Is there a time when both Seattle, WA, and Longmont, CO, are at work?
Yes: from 9:00 AM to 5:00 PM in Seattle (10:00 AM to 6:00 PM in Longmont), the working days (9:00 AM–6:00 PM) overlap.
When is it already the next day in Longmont, CO?
From 11:00 PM in Seattle, WA, it is already the next day in Longmont. The other way round, until 1:00 AM in Longmont it is still the previous day in Seattle.
Is the time difference between Seattle, WA, and Longmont, CO, the same all year?
Yes. Both places switch to summer time and back on the same dates, so the gap remains 1 hour.
