May is a good month at Haleakalā — it ranks 8th of the twelve here. Days run around 63°F by afternoon and 46°F at night, with 13.1 hours of daylight.
May against the park's best
| Month | Verdict | Avg. visits | vs. peak | High | Low | Snow | Daylight |
|---|---|---|---|---|---|---|---|
| May (this page) | Good | 79,332 | −3% | 63°F | 46°F | 0" | 13.1 h |
| February (best) | Good | 60,634 | −26% | 60°F | 43°F | 0" | 11.4 h |
| July (peak crowds) | Good | 81,811 | peak | 66°F | 49°F | 0" | 13.3 h |
Weather figures are for the park headquarters area (7,000 ft — the summit runs colder) — the Haleakala RS 338 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 May a good time to visit Haleakalā?
It is a reasonable month — the park has stronger ones, but the records don't argue against it. May ranks 8 of 12 at Haleakalā on crowds, weather, daylight, and access together.
How crowded is Haleakalā in May?
About 79,332 recreation visits on average — 3% below July, the park's peak.
How warm is Haleakalā in May?
Average highs around 63°F and lows around 46°F at the Haleakala RS 338 station.
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