Haleakalā in June: Crowds, Weather & What to Pack

Peak crowds · VisitWhen score 61/100 · #5 of 12 months

June is peak season — the 2nd-busiest month of the year, at Haleakalā National Park: crowds run 99% of the July peak (81,392 average visits). Weather: highs average 66°F and lows 48°F, with 1.6″ of precipitation and 13.4 hours of daylight. Computed from NPS and NOAA data.

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Haleakalā in June: what the park service says

June begins the summer months, which the park's cabin page ties to drought, when backcountry water has to be packed in rather than found. The primitive tent sites at Hōlua and Palikū have pit toilets and, outside dry spells, untreated water nearby that must be filtered first. Those sites go on sale half a year before the date. Budget the return leg generously: crater trails are soft cinder and loose rock, and the park suggests allowing twice as long to climb out as you spent walking in, on routes between 9,780 and 6,380 feet. If something goes wrong, medical help can take up to an hour to reach you.

Source: NPS 1, NPS 2, NPS 3, checked 2026-11-08.

Crowds in June

Haleakalā averages 81,392 recreation visits in June — 99% of what July, the peak month, draws. Trailheads and parking fill accordingly — book early and start days at dawn.

Weather & daylight

Days are mild (highs average 66°F), and nights stay mild (lows average 48°F). It is typically dry (1.6″ of precipitation). Mid-month daylight runs 13.4 hours.

NOAA 1991–2020 monthly normals, station HALEAKALA RS 338, HI US (7 mi from park coordinates, 6,962 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of June.

What to pack for Haleakalā in June

Computed from the month's weather normals above — not a generic list.

• Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month

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If your dates are flexible, consider shifting: The computed best months for Haleakalā are April and August.

Also at their best in June

Other parks whose computed June verdict is a best window — same NPS × NOAA formula:

• North Cascades in June — 26% of peak crowds, highs 74°F, score 91/100
• Katmai in June — 34% of peak crowds, highs 59°F, score 88/100
• Crater Lake in June — 44% of peak crowds, highs 57°F, score 84/100
• Olympic in June — 48% of peak crowds, highs 67°F, score 78/100

Common questions

See also: the best national parks to visit in June · Last verified 2026-09-24