Moon · December 2025
Moon calendar for Boston, Massachusetts, United States: December 2025
Daily moon phases, illumination, moonrise and moonset in Boston, Massachusetts, United States for December 2025. Full moon: December 4, 2025. All times are shown in the local time of Boston, Massachusetts, United States.
Full moonThursday, December 4, 2025, 6:18 PM
New moonFriday, December 19, 2025, 9:59 PM
| Day | Phase | Illumination | Moonrise | Moonset |
|---|---|---|---|---|
| 1 | Waxing Gibbous | 86% | 1:33 PM | 3:28 AM |
| 2 | Waxing Gibbous | 93% | 1:48 PM | 4:27 AM |
| 3 | Waxing Gibbous | 98% | 2:22 PM | 5:56 AM |
| 4 | Full Moon | 100% | 3:21 PM | 7:30 AM |
| 5 | Full Moon | 99% | 4:09 PM | 8:28 AM |
| 6 | Waning Gibbous | 96% | 5:23 PM | 9:39 AM |
| 7 | Waning Gibbous | 90% | 6:24 PM | 10:23 AM |
| 8 | Waning Gibbous | 82% | 7:47 PM | 11:07 AM |
| 9 | Waning Gibbous | 73% | 9:15 PM | 11:35 AM |
| 10 | Waning Gibbous | 63% | 10:21 PM | 11:49 AM |
| 11 | Last Quarter | 52% | 11:34 PM | 12:17 PM |
| 12 | Last Quarter | 42% | — | 12:25 PM |
| 13 | Waning Crescent | 33% | 12:26 AM | 12:45 PM |
| 14 | Waning Crescent | 24% | 1:37 AM | 1:23 PM |
| 15 | Waning Crescent | 16% | 2:29 AM | 1:35 PM |
| 16 | Waning Crescent | 10% | 3:40 AM | 1:59 PM |
| 17 | Waning Crescent | 5% | 4:33 AM | 2:25 PM |
| 18 | Waning Crescent | 2% | 5:43 AM | 3:19 PM |
| 19 | New Moon | 0% | 6:32 AM | 3:53 PM |
| 20 | New Moon | 0% | 7:37 AM | 4:40 PM |
| 21 | Waxing Crescent | 3% | 8:20 AM | 5:49 PM |
| 22 | Waxing Crescent | 6% | 8:52 AM | 7:00 PM |
| 23 | Waxing Crescent | 12% | 9:34 AM | 8:12 PM |
| 24 | Waxing Crescent | 20% | 9:52 AM | 9:29 PM |
| 25 | Waxing Crescent | 29% | 10:21 AM | 10:24 PM |
| 26 | First Quarter | 40% | 10:30 AM | 11:38 PM |
| 27 | First Quarter | 51% | 11:07 AM | — |
| 28 | Waxing Gibbous | 62% | 11:34 AM | 12:52 AM |
| 29 | Waxing Gibbous | 73% | 11:48 AM | 2:17 AM |
| 30 | Waxing Gibbous | 83% | 12:21 PM | 3:37 AM |
| 31 | Waxing Gibbous | 91% | 1:05 PM | 4:56 AM |
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Frequently asked questions
When is the full moon in December 2025 in Boston, Massachusetts, United States?
The full moon peaks on Thursday, December 4, 2025, 6:18 PM (local time).
When is the new moon in December 2025?
The new moon falls on Friday, December 19, 2025, 9:59 PM (local time) — the darkest nights of the month, best for stargazing.
Data: Meeus astronomical algorithms. How we calculate this
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