What time is it in Boulder, Colorado?

Boulder is currently on daylight saving time. The next change is Sunday, November 1, 2026, when 2:00 am becomes 1:00 am local time.

Boulder sits at 40.02°N, 105.25°W. For sunrise and sunset there — which do depend on exactly where it is, unlike the clock — see sunrise and sunset in Boulder.

The clock says the same thing everywhere in Mountain Daylight Time, but the sun does not. Over Boulder it is highest at 12:52 pm today — 52 minutes after clock noon.

At 105.3°W, Boulder sits well toward the western edge of its zone, which is why the sun stays up later here than the clock suggests. Daylight saving adds another hour on top until the clocks change.

Today runs 12 hours 1 minute in Boulder, and the day is getting shorter by 3 minutes a day. Across the year it swings 5 hours 42 minutes, from 15 hours 1 minute at the June solstice down to 9 hours 19 minutes in December.

At 40.0°N that puts Boulder between Kailua at 2 hours 22 minutes and Fairbanks at 18 hours 9 minutes.