Moon · December 2026
Moon calendar for Helena, Montana, United States: December 2026
Daily moon phases, illumination, moonrise and moonset in Helena, Montana, United States for December 2026. Full moon: December 23, 2026. All times are shown in the local time of Helena, Montana, United States.
Full moonWednesday, December 23, 2026, 6:16 PM
New moonTuesday, December 8, 2026, 4:17 PM
| Day | Phase | Illumination | Moonrise | Moonset |
|---|---|---|---|---|
| 1 | Last Quarter | 45% | — | 1:35 PM |
| 2 | Waning Crescent | 34% | 12:35 AM | 1:47 PM |
| 3 | Waning Crescent | 25% | 2:04 AM | 2:10 PM |
| 4 | Waning Crescent | 16% | 3:25 AM | 2:23 PM |
| 5 | Waning Crescent | 9% | 4:23 AM | 2:41 PM |
| 6 | Waning Crescent | 5% | 5:38 AM | 3:27 PM |
| 7 | Waning Crescent | 1% | 6:33 AM | 3:45 PM |
| 8 | New Moon | 0% | 7:44 AM | 4:26 PM |
| 9 | New Moon | 1% | 8:31 AM | 5:31 PM |
| 10 | Waxing Crescent | 3% | 9:33 AM | 6:20 PM |
| 11 | Waxing Crescent | 7% | 10:07 AM | 7:32 PM |
| 12 | Waxing Crescent | 13% | 10:26 AM | 8:24 PM |
| 13 | Waxing Crescent | 19% | 10:56 AM | 9:37 PM |
| 14 | Waxing Crescent | 28% | 11:30 AM | 10:33 PM |
| 15 | Waxing Crescent | 37% | 11:38 AM | 11:47 PM |
| 16 | First Quarter | 47% | 11:50 AM | — |
| 17 | First Quarter | 57% | 12:14 PM | 1:08 AM |
| 18 | Waxing Gibbous | 68% | 12:24 PM | 2:18 AM |
| 19 | Waxing Gibbous | 78% | 12:39 PM | 3:36 AM |
| 20 | Waxing Gibbous | 86% | 1:24 PM | 4:46 AM |
| 21 | Waxing Gibbous | 93% | 1:47 PM | 6:18 AM |
| 22 | Waxing Gibbous | 98% | 2:26 PM | 7:40 AM |
| 23 | Full Moon | 100% | 3:38 PM | 8:43 AM |
| 24 | Full Moon | 99% | 4:50 PM | 9:43 AM |
| 25 | Waning Gibbous | 96% | 6:19 PM | 10:21 AM |
| 26 | Waning Gibbous | 90% | 7:43 PM | 10:43 AM |
| 27 | Waning Gibbous | 82% | 9:15 PM | 11:27 AM |
| 28 | Waning Gibbous | 72% | 10:24 PM | 11:36 AM |
| 29 | Waning Gibbous | 62% | 11:42 PM | 11:48 AM |
| 30 | Last Quarter | 51% | — | 12:15 PM |
| 31 | Last Quarter | 40% | 12:56 AM | 12:24 PM |
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Frequently asked questions
When is the full moon in December 2026 in Helena, Montana, United States?
The full moon peaks on Wednesday, December 23, 2026, 6:16 PM (local time).
When is the new moon in December 2026?
The new moon falls on Tuesday, December 8, 2026, 4:17 PM (local time) — the darkest nights of the month, best for stargazing.
Data: Meeus astronomical algorithms. How we calculate this
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