Seattle, WA to Castle Rock, CO: time difference
Castle Rock, 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 13:03 1:03 PM Castle Rock, CO 14:03 2:03 PM You –:–
13:03 1:03 PM
Pacific Daylight Time · UTC-7
☀️ 07:22 · 🌙 18:32
14:03 2:03 PM
Mountain Daylight Time · UTC-6
☀️ 07:05 · 🌙 18:29
·
+1 h
Castle Rock, CO is 1 h ahead of Seattle, WA.
When you, Seattle, WA and Castle Rock, 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
🇺🇸 Castle Rock, 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
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Time zones side by side
| Detail | 🇺🇸 Seattle, WA | 🇺🇸 Castle Rock, CO |
|---|---|---|
| Local time | 13:03 | 14:03 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 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 | 07:22 | 07:05 |
| Sunset | 18:32 | 18:29 |
| Daylight | 11 h 11 min | 11 h 25 min |
| People on this clock | 737,015 | 73,158 |
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 Castle Rock, CO: common questions
How many hours ahead of Seattle, WA, is Castle Rock, CO?
The clocks in Castle Rock are 1 hour ahead of those in Seattle (UTC−6 and UTC−7).
What time is it in Castle Rock, CO, when it is 9:00 AM in Seattle, WA?
When it is 9:00 AM in Seattle, it is 10:00 AM in Castle Rock.
What time is it in Castle Rock, CO, at the end of the working day in Seattle, WA?
The working day in Seattle ends at 6:00 PM; in Castle Rock it is 7:00 PM at that moment.
When do working hours in Seattle, WA, and in Castle Rock, CO, overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 5:00 PM in Seattle, which is 10:00 AM to 6:00 PM in Castle Rock.
When is it already the next day in Castle Rock, CO?
From 11:00 PM in Seattle, WA, it is already the next day in Castle Rock. The other way round, until 1:00 AM in Castle Rock it is still the previous day in Seattle.
Is the time difference between Seattle, WA, and Castle Rock, CO, the same all year?
Yes. Both places switch to summer time and back on the same dates, so the gap remains 1 hour.
