Moon · September 2026
Moon calendar for Casper, Wyoming, United States: September 2026
Daily moon phases, illumination, moonrise and moonset in Casper, Wyoming, United States for September 2026. Full moon: September 26, 2026. All times are shown in the local time of Casper, Wyoming, United States.
Full moonSaturday, September 26, 2026, 3:33 PM
New moonThursday, September 10, 2026, 6:18 PM
| Day | Phase | Illumination | Moonrise | Moonset |
|---|---|---|---|---|
| 1 | Waning Gibbous | 78% | 9:19 PM | 11:56 AM |
| 2 | Waning Gibbous | 68% | 9:40 PM | 1:29 PM |
| 3 | Last Quarter | 56% | 10:22 PM | 2:30 PM |
| 4 | Last Quarter | 45% | 11:31 PM | 3:48 PM |
| 5 | Waning Crescent | 33% | — | 4:47 PM |
| 6 | Waning Crescent | 22% | 12:26 AM | 5:41 PM |
| 7 | Waning Crescent | 13% | 1:51 AM | 6:20 PM |
| 8 | Waning Crescent | 7% | 3:26 AM | 6:22 PM |
| 9 | Waning Crescent | 2% | 4:27 AM | 7:25 PM |
| 10 | New Moon | 0% | 5:47 AM | 7:35 PM |
| 11 | New Moon | 1% | 7:07 AM | 7:50 PM |
| 12 | Waxing Crescent | 4% | 8:17 AM | 8:18 PM |
| 13 | Waxing Crescent | 8% | 9:31 AM | 8:27 PM |
| 14 | Waxing Crescent | 15% | 10:24 AM | 9:08 PM |
| 15 | Waxing Crescent | 22% | 11:36 AM | 9:36 PM |
| 16 | Waxing Crescent | 31% | 12:27 PM | 10:12 PM |
| 17 | First Quarter | 40% | 1:38 PM | 10:42 PM |
| 18 | First Quarter | 49% | 2:24 PM | 11:41 PM |
| 19 | First Quarter | 59% | 3:26 PM | — |
| 20 | Waxing Gibbous | 68% | 3:53 PM | 12:30 AM |
| 21 | Waxing Gibbous | 76% | 4:24 PM | 1:39 AM |
| 22 | Waxing Gibbous | 84% | 4:47 PM | 2:34 AM |
| 23 | Waxing Gibbous | 90% | 5:29 PM | 3:47 AM |
| 24 | Waxing Gibbous | 96% | 5:39 PM | 4:52 AM |
| 25 | Waxing Gibbous | 99% | 6:00 PM | 6:06 AM |
| 26 | Full Moon | 100% | 6:22 PM | 7:24 AM |
| 27 | Waning Gibbous | 99% | 6:31 PM | 8:21 AM |
| 28 | Waning Gibbous | 95% | 7:19 PM | 9:38 AM |
| 29 | Waning Gibbous | 89% | 7:39 PM | 10:53 AM |
| 30 | Waning Gibbous | 81% | 8:19 PM | 12:18 PM |
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Frequently asked questions
When is the full moon in September 2026 in Casper, Wyoming, United States?
The full moon peaks on Saturday, September 26, 2026, 3:33 PM (local time).
When is the new moon in September 2026?
The new moon falls on Thursday, September 10, 2026, 6:18 PM (local time) — the darkest nights of the month, best for stargazing.
Data: Meeus astronomical algorithms. How we calculate this
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