First Day of Autumn in Castle Rock
United States — September 1, 2026
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Days
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Hours
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Minutes
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until First Day of Autumn on September 1, 2026
64% elapsed
130 days remaining
Castle Rock
04:18:42
America/Denver
GMT / UTC
10:18:42
Etc/UTC
Mecca
13:18:42
UTC+3
About First Day of Autumn
Meteorological start of autumn on September 1, marking the transition from summer to cooler months.
Castle Rock Quick Facts
- Country
- 🇺🇸 United States
- Timezone
- America/Denver
- Population
- 55,591
- Coordinates
- 39.3722, -104.8561
Sun Times Today in Castle Rock
Sunrise
06:10
Solar Noon
12:57
Sunset
19:45
Golden Hour
19:08
Daylight
13h 34m
Local time
Prayer Times Today in Castle Rock
| Prayer | Time (Local) |
|---|---|
| Fajr | 04:31 |
| Sunrise | 06:10 |
| Dhuhr | 12:57 |
| Asr | 16:44 |
| Maghrib | 19:45 |
| Isha | 21:17 |
Based on MWL calculation method. Local time.
Typical Weather
High
29.7°C
Low
11.4°C
Condition
Cloudy
Historical average for this date. Not a forecast.
Nearby Cities
Upcoming Events in Castle Rock
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Frequently Asked Questions
- When is First Day of Autumn in Castle Rock?
- First Day of Autumn in Castle Rock falls on Tuesday, September 1, 2026.
- What timezone is Castle Rock in?
- Castle Rock is in the America/Denver timezone.