Moon · December 2025
Moon calendar for Idaho Falls, Idaho, United States: December 2025
Daily moon phases, illumination, moonrise and moonset in Idaho Falls, Idaho, United States for December 2025. Full moon: December 4, 2025. All times are shown in the local time of Idaho Falls, Idaho, United States.
Full moonThursday, December 4, 2025, 4:18 PM
New moonFriday, December 19, 2025, 7:59 PM
| Day | Phase | Illumination | Moonrise | Moonset |
|---|---|---|---|---|
| 1 | Waxing Gibbous | 87% | 2:17 PM | 4:15 AM |
| 2 | Waxing Gibbous | 94% | 2:26 PM | 5:36 AM |
| 3 | Waxing Gibbous | 98% | 3:20 PM | 6:51 AM |
| 4 | Full Moon | 100% | 3:51 PM | 8:19 AM |
| 5 | Waning Gibbous | 99% | 4:42 PM | 9:38 AM |
| 6 | Waning Gibbous | 95% | 6:02 PM | 10:27 AM |
| 7 | Waning Gibbous | 89% | 7:28 PM | 11:31 AM |
| 8 | Waning Gibbous | 81% | 8:28 PM | 11:50 AM |
| 9 | Waning Gibbous | 72% | 9:53 PM | 12:21 PM |
| 10 | Waning Gibbous | 62% | 11:13 PM | 12:31 PM |
| 11 | Last Quarter | 52% | — | 1:05 PM |
| 12 | Last Quarter | 41% | 12:20 AM | 1:30 PM |
| 13 | Waning Crescent | 32% | 1:33 AM | 1:36 PM |
| 14 | Waning Crescent | 23% | 2:25 AM | 1:52 PM |
| 15 | Waning Crescent | 16% | 3:36 AM | 2:19 PM |
| 16 | Waning Crescent | 10% | 4:27 AM | 2:32 PM |
| 17 | Waning Crescent | 5% | 5:39 AM | 3:26 PM |
| 18 | Waning Crescent | 2% | 6:30 AM | 3:50 PM |
| 19 | New Moon | 0% | 7:38 AM | 4:31 PM |
| 20 | New Moon | 1% | 8:24 AM | 5:38 PM |
| 21 | Waxing Crescent | 3% | 9:18 AM | 6:30 PM |
| 22 | Waxing Crescent | 7% | 9:45 AM | 7:47 PM |
| 23 | Waxing Crescent | 13% | 10:20 AM | 8:56 PM |
| 24 | Waxing Crescent | 21% | 10:31 AM | 10:13 PM |
| 25 | Waxing Crescent | 30% | 11:15 AM | 11:31 PM |
| 26 | First Quarter | 41% | 11:34 AM | — |
| 27 | First Quarter | 52% | 11:44 AM | 12:26 AM |
| 28 | Waxing Gibbous | 63% | 12:16 PM | 1:37 AM |
| 29 | Waxing Gibbous | 74% | 12:26 PM | 3:22 AM |
| 30 | Waxing Gibbous | 84% | 1:13 PM | 4:26 AM |
| 31 | Waxing Gibbous | 91% | 1:43 PM | 5:54 AM |
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Frequently asked questions
When is the full moon in December 2025 in Idaho Falls, Idaho, United States?
The full moon peaks on Thursday, December 4, 2025, 4:18 PM (local time).
When is the new moon in December 2025?
The new moon falls on Friday, December 19, 2025, 7:59 PM (local time) — the darkest nights of the month, best for stargazing.
Data: Meeus astronomical algorithms. How we calculate this
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