Blue hour
Blue Hour in Boulder, CO
Blue hour in Boulder is the short twilight stretch when the sun sits between about −6° and −4° — just before sunrise and just after sunset — bathing the sky in even, cool blue light. Here are today's morning and evening blue hours for Boulder, Colorado.
Boulder, CO
Saturday, June 20, 2026
Morning golden hour
5:09 AM – 6:13 AM
1h 4m
Evening golden hour
7:52 PM – 8:56 PM
1h 4m
Golden & blue hour
Morning golden hour5:09 AM – 6:13 AM1h 4m
Evening golden hour7:52 PM – 8:56 PM1h 4m
Morning blue hour4:59 AM – 5:09 AM10 min
Evening blue hour8:56 PM – 9:06 PM10 min
Sun
Sunrise5:32 AM58° ENE
Sunset8:33 PM302° WNW
Solar noon1:02 PM
Day length15h 1m
Dawn · civil4:59 AM
Dawn · nautical4:17 AM
Dawn · astronomical3:28 AM
Dusk · civil9:06 PM
Dusk · nautical9:47 PM
Dusk · astronomical10:36 PM
Moon
Waxing Crescent
38% illuminated
- Moonrise
- 11:51 AM84° E
- Moonset
- 12:15 AM280° W
Horizon directions
SunriseSunsetMoonriseMoonset
More for Boulder
Gear for the shot
- Travel tripod Sharp frames in dim blue-hour light.
- Ball head Fast, precise recomposition on the tripod.
- Remote shutter release Avoid shake on long exposures.
- Headlamp Hands-free setup before dawn and after dusk.
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Blue hour in nearby cities
More in Colorado
Boulder — frequently asked
- When is blue hour today in Boulder?
- Boulder has a morning blue hour ending around dawn and an evening blue hour beginning right after sunset. Today's exact windows are in the planner above.
- Is blue hour before or after golden hour?
- In the evening, golden hour comes first (ending at sunset), then blue hour. In the morning the order reverses: blue hour, then golden hour through sunrise.
- Do I need a tripod for blue hour in Boulder?
- Usually yes — blue hour light is dim, so longer exposures and a tripod help keep images sharp and noise-free.