September is a good month at Great Basin — it ranks 7th of the twelve here. Expect about 6% fewer visitors than July, the park's peak — 24,632 visits on average. Days run around 73°F by afternoon and 48°F at night, with 12.4 hours of daylight.
September against the park's best
| Month | Verdict | Avg. visits | vs. peak | High | Low | Snow | Daylight |
|---|---|---|---|---|---|---|---|
| September (this page) | Good | 24,632 | −6% | 73°F | 48°F | 0" | 12.4 h |
| April (best) | Excellent | 8,053 | −69% | 55°F | 32°F | 7.2" | 13.2 h |
| July (peak crowds) | Good | 26,101 | peak | 85°F | 58°F | 0" | 14.6 h |
Weather figures are for the Lehman Caves area (about 6,800 ft) — the Great Basin NP station. Visits are 2021–2025 averages; climate normals cover 1991–2020. Conditions vary across the park; check current status before you go.
Common questions
Is September a good time to visit Great Basin?
It is a reasonable month — the park has stronger ones, but the records don't argue against it. September ranks 7 of 12 at Great Basin on crowds, weather, daylight, and access together.
How crowded is Great Basin in September?
About 24,632 recreation visits on average — 6% below July, the park's peak.
How warm is Great Basin in September?
Average highs around 73°F and lows around 48°F at the Great Basin NP station.
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