Moon · September 2025
Moon calendar for Seattle, Washington, United States: September 2025
Daily moon phases, illumination, moonrise and moonset in Seattle, Washington, United States for September 2025. Full moon: September 7, 2025. All times are shown in the local time of Seattle, Washington, United States.
Full moonSunday, September 7, 2025, 12:53 PM
New moonSunday, September 21, 2025, 9:49 AM
| Day | Phase | Illumination | Moonrise | Moonset |
|---|---|---|---|---|
| 1 | Waxing Gibbous | 65% | 4:17 PM | — |
| 2 | Waxing Gibbous | 74% | 5:09 PM | 12:33 AM |
| 3 | Waxing Gibbous | 82% | 5:41 PM | 1:44 AM |
| 4 | Waxing Gibbous | 89% | 6:15 PM | 2:50 AM |
| 5 | Waxing Gibbous | 95% | 6:28 PM | 4:13 AM |
| 6 | Waxing Gibbous | 99% | 6:55 PM | 5:33 AM |
| 7 | Full Moon | 100% | 7:27 PM | 6:33 AM |
| 8 | Waning Gibbous | 99% | 7:36 PM | 8:05 AM |
| 9 | Waning Gibbous | 95% | 7:47 PM | 9:32 AM |
| 10 | Waning Gibbous | 89% | 8:12 PM | 10:41 AM |
| 11 | Waning Gibbous | 80% | 8:25 PM | 12:17 PM |
| 12 | Waning Gibbous | 70% | 9:07 PM | 1:40 PM |
| 13 | Last Quarter | 58% | 9:44 PM | 3:20 PM |
| 14 | Last Quarter | 47% | 10:35 PM | 4:23 PM |
| 15 | Waning Crescent | 35% | 11:59 PM | 5:29 PM |
| 16 | Waning Crescent | 25% | — | 5:56 PM |
| 17 | Waning Crescent | 16% | 1:29 AM | 6:22 PM |
| 18 | Waning Crescent | 9% | 2:34 AM | 6:35 PM |
| 19 | Waning Crescent | 4% | 4:08 AM | 7:03 PM |
| 20 | New Moon | 1% | 5:30 AM | 7:27 PM |
| 21 | New Moon | 0% | 6:25 AM | 7:34 PM |
| 22 | Waxing Crescent | 1% | 7:39 AM | 7:39 PM |
| 23 | Waxing Crescent | 4% | 8:35 AM | 7:55 PM |
| 24 | Waxing Crescent | 9% | 9:51 AM | 8:17 PM |
| 25 | Waxing Crescent | 15% | 11:01 AM | 8:29 PM |
| 26 | Waxing Crescent | 22% | 12:10 PM | 9:15 PM |
| 27 | Waxing Crescent | 30% | 1:12 PM | 9:45 PM |
| 28 | Waxing Crescent | 39% | 2:12 PM | 10:27 PM |
| 29 | First Quarter | 49% | 2:59 PM | 11:37 PM |
| 30 | First Quarter | 59% | 3:40 PM | — |
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Frequently asked questions
When is the full moon in September 2025 in Seattle, Washington, United States?
The full moon peaks on Sunday, September 7, 2025, 12:53 PM (local time).
When is the new moon in September 2025?
The new moon falls on Sunday, September 21, 2025, 9:49 AM (local time) — the darkest nights of the month, best for stargazing.
Data: Meeus astronomical algorithms. How we calculate this
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