Moon · December 2025
Moon calendar for Gillette, Wyoming, United States: December 2025
Daily moon phases, illumination, moonrise and moonset in Gillette, Wyoming, United States for December 2025. Full moon: December 4, 2025. All times are shown in the local time of Gillette, Wyoming, 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% | 1:39 PM | 3:42 AM |
| 2 | Waxing Gibbous | 94% | 2:10 PM | 5:17 AM |
| 3 | Waxing Gibbous | 98% | 2:28 PM | 6:26 AM |
| 4 | Full Moon | 100% | 3:29 PM | 7:52 AM |
| 5 | Waning Gibbous | 99% | 4:17 PM | 9:20 AM |
| 6 | Waning Gibbous | 95% | 5:33 PM | 10:13 AM |
| 7 | Waning Gibbous | 89% | 6:37 PM | 10:54 AM |
| 8 | Waning Gibbous | 81% | 8:13 PM | 11:36 AM |
| 9 | Waning Gibbous | 72% | 9:33 PM | 11:54 AM |
| 10 | Waning Gibbous | 62% | 10:29 PM | 12:19 PM |
| 11 | Last Quarter | 52% | 11:45 PM | 12:26 PM |
| 12 | Last Quarter | 41% | — | 12:42 PM |
| 13 | Waning Crescent | 32% | 12:51 AM | 1:22 PM |
| 14 | Waning Crescent | 23% | 2:04 AM | 1:33 PM |
| 15 | Waning Crescent | 16% | 3:16 AM | 1:40 PM |
| 16 | Waning Crescent | 10% | 4:09 AM | 2:16 PM |
| 17 | Waning Crescent | 5% | 5:25 AM | 2:35 PM |
| 18 | Waning Crescent | 2% | 6:18 AM | 3:32 PM |
| 19 | New Moon | 0% | 7:23 AM | 4:13 PM |
| 20 | New Moon | 1% | 8:08 AM | 5:15 PM |
| 21 | Waxing Crescent | 3% | 8:37 AM | 6:13 PM |
| 22 | Waxing Crescent | 7% | 9:32 AM | 7:29 PM |
| 23 | Waxing Crescent | 13% | 9:50 AM | 8:24 PM |
| 24 | Waxing Crescent | 21% | 10:21 AM | 9:38 PM |
| 25 | Waxing Crescent | 30% | 10:29 AM | 10:45 PM |
| 26 | First Quarter | 41% | 11:01 AM | — |
| 27 | First Quarter | 52% | 11:31 AM | 12:12 AM |
| 28 | Waxing Gibbous | 63% | 11:40 AM | 1:33 AM |
| 29 | Waxing Gibbous | 74% | 12:10 PM | 2:35 AM |
| 30 | Waxing Gibbous | 84% | 12:26 PM | 4:12 AM |
| 31 | Waxing Gibbous | 91% | 1:19 PM | 5:37 AM |
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Frequently asked questions
When is the full moon in December 2025 in Gillette, Wyoming, 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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