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20 December 2029 — Total Lunar Eclipse — Boulder, CO, USA

20 Dec 2029, 16:41
Near max in Boulder
Global Event: Total Lunar Eclipse
Local Type: Partial Lunar Eclipse in Boulder, Colorado
Begins: Thu, 20 Dec 2029, 16:37
Maximum: Thu, 20 Dec 2029, 16:40 0.656 Magnitude
Ends: Thu, 20 Dec 2029, 18:41
Duration: 2 hours, 3 minutes

All times shown on this page are local time.
Location

20 December 2029 — Total Lunar Eclipse — Boulder

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The animation shows what the eclipse approximately looks like in Boulder. Stages and times of the eclipse are outlined below. All times are local time (MST) for Boulder.

Time Phase Event Direction Altitude
12:42 Thu, 20 Dec Not directly visible Penumbral Eclipse begins Below horizon Map direction North-northeast 12°
-26.5°
13:55 Thu, 20 Dec Not directly visible Partial Eclipse begins Below horizon Map direction North-northeast 29°
-21.7°
15:15 Thu, 20 Dec Not directly visible Total Eclipse begins Below horizon Map direction Northeast 45°
-12.8°
15:42 Thu, 20 Dec Not directly visible Maximum Eclipse Below horizon Map direction Northeast 50°
-9.2°
16:08 Thu, 20 Dec Not directly visible Total Eclipse ends Below horizon Map direction Northeast 54°
-5.3°
16:37 Thu, 20 Dec Rising Moonrise Rising Map direction East-northeast 59°
-0.2°
16:40 Thu, 20 Dec
Maximum in Boulder This is the moment when the eclipse reaches its greatest magnitude while the entire Moon is above the horizon in Boulder. The true maximum point of this eclipse cannot be seen in Boulder because the Moon is below the horizon at that time.
Since the Moon is near the horizon at this time, we recommend going to a high point or finding an unobstructed area with free sight to East-northeast for the best view of the eclipse. 		Map direction East-northeast 59°
0.2°
17:28 Thu, 20 Dec
Partial Eclipse ends Partial moon eclipse ends.
Moon close to horizon, so make sure you have free sight to East-northeast. 		Map direction East-northeast 66°
7.7°
18:41 Thu, 20 Dec
Penumbral Eclipse ends The Earth's penumbra ends. Map direction East-northeast 77°
20.3°

How to use altitude & direction to find in the sky

The curvature of the shadow's path and the apparent rotation of the Moon's disk is due to the Earth's rotation.

The total phase of this lunar eclipse is not visible in Boulder, but it can be observed there as a partial lunar eclipse.

Cloud Coverage (20 Dec)

In the past, this day was cloudy 68% of the time (since 2000).

Lunar Eclipses
  1. When Is the Next Lunar Eclipse?
  2. Total Lunar Eclipse
  3. Why Does the Moon Turn Red?
  4. Partial Lunar Eclipse
  5. Penumbral Lunar Eclipse
  6. Can I See a Lunar Eclipse?
  7. Blood Moon - Total Lunar Eclipse
  8. Eclipse Seasons
  9. What Is a Tetrad?
  10. Magnitude of Eclipses
  11. Accuracy of Our Eclipse Calculations
  12. Why Two Dates for a Lunar Eclipse?

Eclipses

Eclipses and Transits Visible in Boulder

Eclipse Visibility From Boulder Visibility Worldwide
3 Mar 2026 Total Lunar Eclipse Total Lunar Eclipse
27–28 Aug 2026 Partial Lunar Eclipse Partial Lunar Eclipse
20 Feb 2027 Penumbral Lunar Eclipse Penumbral Lunar Eclipse
16–17 Aug 2027 Penumbral Lunar Eclipse Penumbral Lunar Eclipse
11 Jan 2028 Partial Lunar Eclipse Partial Lunar Eclipse

Note: Click on the date link for details in Boulder, or the path map image for global details.

Other eclipses visible in Boulder

Other eclipses worldwide

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