Moon phase, moonrise and moonset times in Boulder, Colorado, United States
Current local time 11:20:28 AM (UTC-6)
Today, September 1
- Moonset11:37 AMMoonrise10:10 PM
- Moon PhaseWaning gibbousIlumination78%
Tomorrow, September 2
- Moonset12:43 PMMoonrise10:47 PM
- Moon PhaseWaning gibbousIlumination68%
- Full Moon27 August10:18 PM
- Third Quarter4 September1:51 AM
- New Moon10 September9:27 PM
- First Quarter18 September2:43 PM
- Full Moon26 September10:48 AM
September 2026 — Moon in Boulder
| Icon | Date | Moonrise | Moonset | Moonrise | Moon phase | Illumination | |
|---|---|---|---|---|---|---|---|
| September 1 | Tue | — | 11:37 AM | 10:10 PM | Waning gibbous | 78% | |
| September 2 | Wed | — | 12:43 PM | 10:47 PM | Waning gibbous | 68% | |
| September 3 | Thu | — | 1:47 PM | 11:31 PM | Waning gibbous | 57% | |
| September 4 | Fri | — | 2:49 PM | — | Third quarter | 45% | |
| September 5 | Sat | 12:21 AM | 3:46 PM | — | Waning crescent | 34% | |
| September 6 | Sun | 1:18 AM | 4:36 PM | — | Waning crescent | 24% | |
| September 7 | Mon | 2:20 AM | 5:19 PM | — | Waning crescent | 14% | |
| September 8 | Tue | 3:25 AM | 5:56 PM | — | Waning crescent | 7% | |
| September 9 | Wed | 4:31 AM | 6:29 PM | — | Waning crescent | 2% | |
| September 10 | Thu | 5:36 AM | 6:59 PM | — | New moon | 0% | |
| September 11 | Fri | 6:42 AM | 7:26 PM | — | Waxing crescent | 0% | |
| September 12 | Sat | 7:46 AM | 7:54 PM | — | Waxing crescent | 3% | |
| September 13 | Sun | 8:51 AM | 8:22 PM | — | Waxing crescent | 8% | |
| September 14 | Mon | 9:57 AM | 8:52 PM | — | Waxing crescent | 14% | |
| September 15 | Tue | 11:03 AM | 9:27 PM | — | Waxing crescent | 22% | |
| September 16 | Wed | 12:09 PM | 10:06 PM | — | Waxing crescent | 30% | |
| September 17 | Thu | 1:13 PM | 10:51 PM | — | Waxing crescent | 40% | |
| September 18 | Fri | 2:13 PM | 11:44 PM | — | First quarter | 49% | |
| September 19 | Sat | — | — | 3:08 PM | Waxing gibbous | 58% | |
| September 20 | Sun | — | 12:42 AM | 3:56 PM | Waxing gibbous | 68% | |
| September 21 | Mon | — | 1:45 AM | 4:37 PM | Waxing gibbous | 76% | |
| September 22 | Tue | — | 2:51 AM | 5:13 PM | Waxing gibbous | 84% | |
| September 23 | Wed | — | 3:57 AM | 5:44 PM | Waxing gibbous | 91% | |
| September 24 | Thu | — | 5:02 AM | 6:13 PM | Waxing gibbous | 96% | |
| September 25 | Fri | — | 6:07 AM | 6:41 PM | Waxing gibbous | 99% | |
| September 26 | Sat | — | 7:12 AM | 7:08 PM | Full moon | 100% | |
| September 27 | Sun | — | 8:17 AM | 7:37 PM | Waning gibbous | 99% | |
| September 28 | Mon | — | 9:23 AM | 8:08 PM | Waning gibbous | 95% | |
| September 29 | Tue | — | 10:29 AM | 8:44 PM | Waning gibbous | 89% | |
| September 30 | Wed | — | 11:34 AM | 9:25 PM | Waning gibbous | 80% |
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