Moon · May 2025
Moon calendar for Helena, Montana, United States: May 2025
Daily moon phases, illumination, moonrise and moonset in Helena, Montana, United States for May 2025. Full moon: May 12, 2025. All times are shown in the local time of Helena, Montana, United States.
Full moonMonday, May 12, 2025, 1:11 PM
New moonMonday, May 26, 2025, 6:39 PM
| Day | Phase | Illumination | Moonrise | Moonset |
|---|---|---|---|---|
| 1 | Waxing Crescent | 21% | 8:14 AM | 1:41 AM |
| 2 | Waxing Crescent | 30% | 9:29 AM | 2:27 AM |
| 3 | First Quarter | 41% | 10:31 AM | 3:22 AM |
| 4 | First Quarter | 51% | 12:03 PM | 3:40 AM |
| 5 | Waxing Gibbous | 62% | 1:27 PM | 4:02 AM |
| 6 | Waxing Gibbous | 71% | 2:24 PM | 4:19 AM |
| 7 | Waxing Gibbous | 80% | 3:38 PM | 4:25 AM |
| 8 | Waxing Gibbous | 87% | 4:32 PM | 4:35 AM |
| 9 | Waxing Gibbous | 93% | 5:46 PM | 5:01 AM |
| 10 | Waxing Gibbous | 97% | 6:48 PM | 5:27 AM |
| 11 | Full Moon | 99% | 8:01 PM | 5:36 AM |
| 12 | Full Moon | 100% | 9:16 PM | 5:52 AM |
| 13 | Waning Gibbous | 99% | 10:14 PM | 6:22 AM |
| 14 | Waning Gibbous | 96% | 11:16 PM | 7:01 AM |
| 15 | Waning Gibbous | 91% | — | 7:28 AM |
| 16 | Waning Gibbous | 85% | 12:10 AM | 8:41 AM |
| 17 | Waning Gibbous | 77% | 12:44 AM | 9:51 AM |
| 18 | Waning Gibbous | 67% | 1:34 AM | 11:17 AM |
| 19 | Last Quarter | 57% | 1:55 AM | 12:22 PM |
| 20 | Last Quarter | 46% | 2:22 AM | 1:40 PM |
| 21 | Waning Crescent | 34% | 2:30 AM | 3:05 PM |
| 22 | Waning Crescent | 24% | 3:01 AM | 4:21 PM |
| 23 | Waning Crescent | 15% | 3:29 AM | 5:41 PM |
| 24 | Waning Crescent | 7% | 3:38 AM | 7:20 PM |
| 25 | Waning Crescent | 2% | 4:02 AM | 8:30 PM |
| 26 | New Moon | 0% | 4:23 AM | 10:05 PM |
| 27 | New Moon | 1% | 5:14 AM | 11:31 PM |
| 28 | Waxing Crescent | 4% | 5:58 AM | — |
| 29 | Waxing Crescent | 10% | 7:11 AM | 12:22 AM |
| 30 | Waxing Crescent | 17% | 8:19 AM | 1:18 AM |
| 31 | Waxing Crescent | 26% | 9:41 AM | 1:41 AM |
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Frequently asked questions
When is the full moon in May 2025 in Helena, Montana, United States?
The full moon peaks on Monday, May 12, 2025, 1:11 PM (local time).
When is the new moon in May 2025?
The new moon falls on Monday, May 26, 2025, 6:39 PM (local time) — the darkest nights of the month, best for stargazing.
Data: Meeus astronomical algorithms. How we calculate this
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