SkyAlmanac

Moon · August 2026

Moon calendar for Great Falls, Montana, United States: August 2026

Daily moon phases, illumination, moonrise and moonset in Great Falls, Montana, United States for August 2026. Full moon: August 28, 2026. All times are shown in the local time of Great Falls, Montana, United States.

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Full moonFriday, August 28, 2026, 1:00 AM
New moonWednesday, August 12, 2026, 9:40 AM
Day Phase Illumination Moonrise Moonset
1 Waning Gibbous 91% 9:48 PM 9:40 AM
2 Waning Gibbous 83% 10:18 PM 10:52 AM
3 Waning Gibbous 74% 10:23 PM 12:16 PM
4 Waning Gibbous 64% 10:33 PM 1:37 PM
5 Last Quarter 53% 11:21 PM 2:55 PM
6 Last Quarter 41% 11:41 PM 4:23 PM
7 Waning Crescent 30% — 5:44 PM
8 Waning Crescent 20% 12:21 AM 6:56 PM
9 Waning Crescent 11% 1:34 AM 7:49 PM
10 Waning Crescent 5% 2:40 AM 8:26 PM
11 Waning Crescent 1% 4:15 AM 8:56 PM
12 New Moon 0% 5:40 AM 9:30 PM
13 Waxing Crescent 2% 7:12 AM 9:37 PM
14 Waxing Crescent 6% 8:22 AM 9:48 PM
15 Waxing Crescent 12% 9:39 AM 10:13 PM
16 Waxing Crescent 19% 10:41 AM 10:23 PM
17 Waxing Crescent 28% 12:06 PM 10:35 PM
18 Waxing Crescent 37% 1:22 PM 11:17 PM
19 First Quarter 47% 2:20 PM 11:38 PM
20 First Quarter 56% 3:33 PM —
21 Waxing Gibbous 65% 4:22 PM 12:14 AM
22 Waxing Gibbous 74% 5:25 PM 12:54 AM
23 Waxing Gibbous 82% 5:58 PM 1:47 AM
24 Waxing Gibbous 88% 6:25 PM 2:43 AM
25 Waxing Gibbous 94% 6:59 PM 3:56 AM
26 Waxing Gibbous 98% 7:31 PM 5:15 AM
27 Full Moon 100% 7:39 PM 6:18 AM
28 Full Moon 100% 7:55 PM 7:34 AM
29 Waning Gibbous 98% 8:17 PM 8:29 AM
30 Waning Gibbous 93% 8:25 PM 9:50 AM
31 Waning Gibbous 86% 8:37 PM 11:24 AM

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Frequently asked questions

When is the full moon in August 2026 in Great Falls, Montana, United States?

The full moon peaks on Friday, August 28, 2026, 1:00 AM (local time).

When is the new moon in August 2026?

The new moon falls on Wednesday, August 12, 2026, 9:40 AM (local time) — the darkest nights of the month, best for stargazing.

Data: Meeus astronomical algorithms. How we calculate this

More for Great Falls, Montana, United States

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