Sun Times in Boulder
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Frequently Asked Questions
What time is sunrise in Boulder?
Sunrise in Boulder on Thursday, August 27, 2026 is at 6:16 AM (Australia/Perth). This time is calculated from the city's coordinates.
What time is sunset in Boulder?
Sunset in Boulder on Thursday, August 27, 2026 is at 5:35 PM (Australia/Perth). This time is calculated from the city's coordinates.
When is golden hour in Boulder?
Morning golden hour in Boulder ends at 6:48 AM. Evening golden hour starts at 5:02 PM.
How long is the day in Boulder?
On Thursday, August 27, 2026 in Boulder there are 11 hours and 19 minutes of daylight between sunrise and sunset.
What time is the sun at its highest point in Boulder?
The sun reaches its highest point (solar noon) in Boulder at 11:55 AM (Australia/Perth). This is when the sun crosses the meridian and shadows are at their shortest.
What time does it get dark in Boulder?
In Boulder, sunset is at 5:35 PM and it gets fully dark (astronomical dusk) at 6:55 PM (Australia/Perth). Civil twilight ends at 5:59 PM when outdoor activities need artificial light.
How long does twilight last in Boulder?
Twilight in Boulder lasts approximately 81 minutes from sunset to full darkness (astronomical dusk). This includes civil twilight, nautical twilight, and astronomical twilight.
What is the earliest sunrise of the year in Boulder?
The earliest sunrise in Boulder in 2026 is at 4:43 AM on November 28 (Australia/Perth). This occurs around the summer solstice when days are longest.
What is the latest sunset of the year in Boulder?
The latest sunset in Boulder in 2026 is at 7:01 PM on January 5 (Australia/Perth). This occurs shortly after the summer solstice.
What time does it actually get dark after sunset in Boulder?
After sunset at 5:35 PM in Boulder, civil twilight ends at 5:59 PM — about 24 minutes later — when the sky becomes too dark for outdoor activities without artificial light. Full darkness (astronomical dusk) arrives at 6:55 PM (Australia/Perth).
What these times mean
Solar times in Boulder shift throughout the year. Each stage of the day brings distinct light that photographers, outdoor planners, and everyday users rely on.
- Dawn
- The first usable twilight before sunrise, when the horizon brightens and color gradually returns to the sky.
- Sunrise
- The moment the upper edge of the sun appears above the horizon, starting direct daylight.
- Golden Hour
- The low-angle window just after sunrise and just before sunset, producing warm, soft light favored by photographers.
- Sunset
- The moment the upper edge of the sun drops below the horizon, ending direct sunlight for the day.
- Dusk
- The fading twilight after sunset, ending with astronomical dusk when the sky becomes fully dark.
Monthly daylight in Boulder
Sunrise, sunset, and total daylight in Boulder on the 15th of each month for 2026. Times reflect the city's local timezone.
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 5:05 AM | 7:00 PM | 13h 55m |
| February | 5:33 AM | 6:42 PM | 13h 10m |
| March | 5:53 AM | 6:11 PM | 12h 18m |
| April | 6:13 AM | 5:34 PM | 11h 21m |
| May | 6:33 AM | 5:07 PM | 10h 34m |
| June | 6:49 AM | 4:59 PM | 10h 10m |
| July | 6:50 AM | 5:10 PM | 10h 20m |
| August | 6:29 AM | 5:28 PM | 10h 59m |
| September | 5:53 AM | 5:46 PM | 11h 53m |
| October | 5:15 AM | 6:04 PM | 12h 49m |
| November | 4:48 AM | 6:28 PM | 13h 40m |
| December | 4:45 AM | 6:52 PM | 14h 08m |
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