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What time is sunrise and sunset in Boulder County?

Today and tomorrow's sunrise and sunset times in Boulder County, Colorado. Plus a monthly calendar with dawn, dusk, solar noon, and day length.

Today

Sunrise
7:14 AM
104° ESEDawn 6:46 AM

Sunrise in Boulder County was at 7:14:26 AM MDT (4h 38m ago).

Sunset
6:15 PM
256° WSWDusk 6:43 PM

Sunset in Boulder County will be at 6:15:58 PM MDT (in 6h 23m).

Now
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Daylight now · Golden hour at 5:29 PM

Daylight
11h 01m
Darkness
10h 13m
Solar noon
12:45 PM
Sun altitude
36.2°
Sun direction
164° SSE
How long golden hour and blue hour last

Tomorrow

Sunrise
7:15 AM
104° ESEDawn 6:47 AM

Sunrise in Boulder County will be at 7:15:32 AM MDT (in 19h 23m).

Sunset
6:14 PM
255° WSWDusk 6:42 PM

Sunset in Boulder County will be at 6:14:40 PM MDT (in 30h 22m).

Moon tonight

Phase, moonrise and moonset in Boulder County

Full Moon
100% illuminated
Moonrise
5:35 PM
Moonset
6:51 AM

Calendar

Mountain Time · select a day to expand

DateSunriseSunsetLength
1 Thu6:49 AM6:51 PM12h 02m
2 Fri6:50 AM6:50 PM11h 59m
3 Sat6:51 AM6:48 PM11h 56m
4 Sun6:52 AM6:46 PM11h 54m
5 Mon6:53 AM6:45 PM11h 51m
6 Tue6:54 AM6:43 PM11h 49m
7 Wed6:55 AM6:42 PM11h 46m
8 Thu6:56 AM6:40 PM11h 43m
9 Fri6:57 AM6:39 PM11h 41m
10 Sat6:58 AM6:37 PM11h 38m
11 Sun6:59 AM6:35 PM11h 36m
12 Mon7:00 AM6:34 PM11h 33m
13 Tue7:01 AM6:32 PM11h 31m
14 Wed7:02 AM6:31 PM11h 28m
15 Thu7:03 AM6:29 PM11h 26m
16 Fri7:04 AM6:28 PM11h 23m
17 Sat7:05 AM6:27 PM11h 21m
18 Sun7:06 AM6:25 PM11h 18m
19 Mon7:07 AM6:24 PM11h 16m
20 Tue7:09 AM6:22 PM11h 13m
21 Wed7:10 AM6:21 PM11h 11m
22 Thu7:11 AM6:19 PM11h 08m
23 Fri7:12 AM6:18 PM11h 06m
24 Sat7:13 AM6:17 PM11h 03m
25 Sun7:14 AM6:15 PM11h 01m
Sunday, October 25
11h 01m 31s of daylight·−2m 24s vs. yesterday·twilight 6:46 AM – 6:43 PM
12a3a6a9a12p3p6p9p12a7:14 AM12:45 PM6:15 PMhorizon
Time
11:53 AM
Altitude
36.2°
Heading
164° SSE
Light
Daylight

11:53 AM, Daylight, altitude 36.2 degrees

26 Mon7:15 AM6:14 PM10h 59m
27 Tue7:16 AM6:13 PM10h 56m
28 Wed7:17 AM6:12 PM10h 54m
29 Thu7:18 AM6:10 PM10h 52m
30 Fri7:19 AM6:09 PM10h 49m
31 Sat7:21 AM6:08 PM10h 47m

Photos

Sunrise and sunset photos of Boulder County from Flickr.

More on Flickr
Flickr photo: Johnny Cash Cloud
Johnny Cash CloudView on Flickr
Flickr photo: Sunset
SunsetView on Flickr
Flickr photo: Morning Fog
Morning FogView on Flickr
Flickr photo: Smoke Enhanced Dawn
Smoke Enhanced DawnView on Flickr
Flickr photo: Sanitas Sunrise
Sanitas SunriseView on Flickr
Flickr photo: James Peak at first light
James Peak at first lightView on Flickr
Flickr photo: The edge of Twilight
The edge of TwilightView on Flickr
Flickr photo: Moonset over lenticulars
Moonset over lenticularsView on Flickr
Flickr photo: North Saint Vrain
North Saint VrainView on Flickr
Flickr photo: Mt. Sanitas Tip Top
Mt. Sanitas Tip TopView on Flickr
Flickr photo: Sun Rising on the Past - Boulder County, Colorado
Sun Rising on the Past - Boulder County, ColoradoView on Flickr
Flickr photo: 2-16-2013 Boulder, CO
2-16-2013 Boulder, COView on Flickr

FAQ

Frequently asked questions about sunrise and sunset in Boulder County, United States

What time does the sun rise in Boulder County today?
Sunrise in Boulder County today (Sunday, October 25, 2026) is at 7:14 AM. The sun comes up in the ESE.
What time does the sun set in Boulder County today?
Sunset today is at 6:15 PM, after 11h 01m of daylight.
When does it get dark in Boulder County tonight?
Civil twilight ends at 6:43 PM. After that you need artificial light for most things outdoors. Astronomical twilight ends at 7:46 PM, which is when night starts by the standard definition.How long after sunset it gets dark
When is the longest day in Boulder County, United States?
The longest day of 2026 in Boulder County is Sunday, June 21, 2026, the summer solstice, with 15h 01m of daylight. In 2027 the summer solstice falls on June 21, 2027.More on the summer solstice
When is the shortest day in Boulder County, United States?
The shortest day of 2026 in Boulder County, Colorado is Monday, December 21, 2026, the winter solstice, with 9h 19m of daylight. In 2027 the winter solstice lands on December 21, 2027.
How much more daylight does Boulder County get in summer than in winter?
Boulder County gets 5h 42m more daylight on its longest day than on its shortest (15h 01m against 9h 19m). Averaged across the year, a day here has 12h 12m of daylight.
When is the earliest sunrise in Boulder County?
The earliest sunrise of 2026 in Boulder County is on Sunday, June 14, 2026, when the sun comes up at 5:31 AM.
When is the latest sunset in Boulder County?
The latest sunset is on Saturday, June 27, 2026 at 8:34 PM.
When is the earliest sunset in Boulder County?
The earliest sunset of the year is on Monday, December 7, 2026, with the sun down by 4:35 PM.Why it comes before the shortest day
When is the latest sunrise in Boulder County?
The latest sunrise is on Saturday, October 31, 2026 at 7:29 AM.
Does Boulder County observe daylight saving time?
Yes. Boulder County uses Mountain Time: clocks go forward on March 8, 2026, then back on November 1, 2026. Sunrise and sunset times jump by an hour on those dates.

Nearby

Other places close to Boulder County

Developers: get this data programmatically with the free JSON API.

GET https://api.sunrisesunset.io/json?lat=40.09246&lng=-105.3577