Moon · January 2026
Moon calendar for Boulder, Colorado, United States: January 2026
Daily moon phases, illumination, moonrise and moonset in Boulder, Colorado, United States for January 2026. Full moon: January 3, 2026. All times are shown in the local time of Boulder, Colorado, United States.
Full moonSaturday, January 3, 2026, 12:13 AM
New moonSunday, January 18, 2026, 3:11 PM
| Day | Phase | Illumination | Moonrise | Moonset |
|---|---|---|---|---|
| 1 | Waxing Gibbous | 97% | 2:23 PM | 6:24 AM |
| 2 | Full Moon | 99% | 3:36 PM | 7:38 AM |
| 3 | Full Moon | 100% | 4:36 PM | 8:24 AM |
| 4 | Waning Gibbous | 97% | 6:08 PM | 9:23 AM |
| 5 | Waning Gibbous | 92% | 7:30 PM | 9:40 AM |
| 6 | Waning Gibbous | 86% | 8:25 PM | 10:15 AM |
| 7 | Waning Gibbous | 78% | 9:38 PM | 10:25 AM |
| 8 | Waning Gibbous | 68% | 10:31 PM | 10:48 AM |
| 9 | Last Quarter | 59% | 11:42 PM | 11:28 AM |
| 10 | Last Quarter | 49% | — | 11:36 AM |
| 11 | Waning Crescent | 39% | 12:35 AM | 12:01 PM |
| 12 | Waning Crescent | 30% | 1:45 AM | 12:23 PM |
| 13 | Waning Crescent | 22% | 2:39 AM | 12:55 PM |
| 14 | Waning Crescent | 15% | 3:47 AM | 1:37 PM |
| 15 | Waning Crescent | 9% | 4:37 AM | 2:20 PM |
| 16 | Waning Crescent | 4% | 5:40 AM | 3:25 PM |
| 17 | Waning Crescent | 1% | 6:24 AM | 4:15 PM |
| 18 | New Moon | 0% | 7:20 AM | 5:28 PM |
| 19 | New Moon | 1% | 7:40 AM | 6:21 PM |
| 20 | Waxing Crescent | 4% | 8:16 AM | 7:34 PM |
| 21 | Waxing Crescent | 9% | 8:28 AM | 8:28 PM |
| 22 | Waxing Crescent | 16% | 9:05 AM | 9:42 PM |
| 23 | Waxing Crescent | 25% | 9:34 AM | 10:59 PM |
| 24 | Waxing Crescent | 35% | 9:46 AM | — |
| 25 | First Quarter | 47% | 10:20 AM | 12:16 AM |
| 26 | First Quarter | 58% | 10:36 AM | 1:35 AM |
| 27 | Waxing Gibbous | 70% | 11:33 AM | 2:39 AM |
| 28 | Waxing Gibbous | 80% | 12:17 PM | 4:12 AM |
| 29 | Waxing Gibbous | 88% | 1:26 PM | 5:31 AM |
| 30 | Waxing Gibbous | 95% | 2:23 PM | 6:20 AM |
| 31 | Waxing Gibbous | 99% | 3:42 PM | 7:16 AM |
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Frequently asked questions
When is the full moon in January 2026 in Boulder, Colorado, United States?
The full moon peaks on Saturday, January 3, 2026, 12:13 AM (local time).
When is the new moon in January 2026?
The new moon falls on Sunday, January 18, 2026, 3:11 PM (local time) — the darkest nights of the month, best for stargazing.
Data: Meeus astronomical algorithms. How we calculate this
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