September is a good month at Hawaiʻi Volcanoes — it ranks 2nd of the twelve here. Expect about 23% fewer visitors than December, the park's peak — 116,627 visits on average. Days run around 73°F by afternoon and 55°F at night, with 12.2 hours of daylight.
September against the park's best
| Month | Verdict | Avg. visits | vs. peak | High | Low | Snow | Daylight |
|---|---|---|---|---|---|---|---|
| September (this page) | Good | 116,627 | −23% | 73°F | 55°F | 0" | 12.2 h |
| May (best) | Good | 112,776 | −25% | 71°F | 53°F | 0" | 13 h |
| December (peak crowds) | Good | 150,746 | peak | 68°F | 52°F | 0" | 11 h |
Weather figures are for the Kīlauea Visitor Center area (4,000 ft) — the Hawaii Vol NP HQ 54 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 Hawaiʻi Volcanoes?
Yes — a solid month, if not the very best. September ranks 2 of 12 at Hawaiʻi Volcanoes on crowds, weather, daylight, and access together.
How crowded is Hawaiʻi Volcanoes in September?
About 116,627 recreation visits on average — 23% below December, the park's peak.
How warm is Hawaiʻi Volcanoes in September?
Average highs around 73°F and lows around 55°F at the Hawaii Vol NP HQ 54 station.
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