What Time is Sunrise and Sunset in Boulder County, CO?
Here are today and tomorrow's sunrise and sunset times in Boulder County, Colorado. You'll also find a sunrise and sunset calendar for Boulder County at the bottom of the page.
Today Thursday, June 4, 2026
Sunrise
5:34 am
Sunrise today in Boulder County was at 5:34 AM MDT ().
Sunset
8:27 pm
Sunset today in Boulder County will be at 8:27 PM MDT ().
Tomorrow Friday, June 5, 2026
Sunrise
5:34 am
Sunrise tomorrow in Boulder County will be at 5:34 AM MDT ().
Sunset
8:28 pm
Sunset tomorrow in Boulder County will be at 8:28 PM MDT ().
Photos Sunrise and Sunset Photos of Boulder County
Sunrise and sunset photos of Boulder County, CO from Flickr.
Calendar Boulder County Sunrise and Sunset Calendar
Sunrise calendar and sunset calendar for Boulder County, Colorado. Discover Boulder County, CO's detailed solar schedule, including day length, dawn, dusk, and solar noon times. Easily explore any month and year with our interactive calendar.
| Date | Dawn | Sunrise | Solar Noon | Sunset | Dusk | Day Length |
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FAQ Frequently Asked Questions about Boulder County
When is the shortest day in Boulder County, CO?
The shortest day of the year in Boulder County, Colorado (winter solstice) will be on Monday, December 21, 2026. In 2027 the shortest day will be on December 22, 2027.
How long is the shortest day in Boulder County, CO?
The shortest day of 2026 in Boulder County, Colorado will be 9 hours and 18 minutes of daylight on December 21 (winter solstice).
When is the longest day in Boulder County, CO?
The longest day in Boulder County, Colorado (summer solstice) will be on Sunday, June 21, 2026. Next year the longest day will be on June 21, 2027.
How long is the longest day in Boulder County, CO?
The longest day of 2026 in Boulder County, Colorado will have 15 hours and 1 minutes of daylight on June 21 (summer solstice).
How much more daylight does Boulder County, CO get in summer vs winter?
Boulder County, Colorado gets 5 hours and 42 minutes more daylight on the summer solstice than the winter solstice. The longest day has 15 hours and 1 minutes of daylight while the shortest day has only 9 hours and 18 minutes. The average day length throughout the year is 12 hours and 12 minutes.
When is the earliest sunrise in Boulder County, CO?
The earliest sunrise time of 2026 in Boulder County, Colorado will be on Sunday, June 14, 2026 at 5:33 AM.
When is the latest sunrise in Boulder County, CO?
The latest sunrise time of 2026 in Boulder County, Colorado will be on Saturday, October 31, 2026 at 7:30 AM.
When is the latest sunset in Boulder County, CO?
The latest sunset time in Boulder County, Colorado will be on Saturday, June 27, 2026 at 8:35 PM.
When is the earliest sunset in Boulder County, CO?
The earliest sunset time in Boulder County, Colorado will be on Tuesday, December 8, 2026 at 4:37 PM.
Cities near Boulder County: Acres Green, Applewood, Aristocrat Ranchettes, Arvada, Ault, Aurora, Berkley, Berthoud, Boulder, Breckenridge.
National Parks near Boulder County: Rocky Mountain National Park, Two Ponds National Wildlife Refuge, Shadow Mountain National Recreation Area.
Use data from this page using our JSON API: https://api.sunrisesunset.io/json?lat=40.09246&lng=-105.3577