Haleakalā in August: Crowds, Weather & What to Pack
Best window · VisitWhen score 65/100 · #1 of 12 months
August is one of the best months of the year to visit Haleakalā National Park: crowds run 86% of the July peak (70,083 average visits). Weather: highs average 66°F and lows 49°F, with 2.2″ of precipitation and 12.9 hours of daylight. Computed from NPS and NOAA data.
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Crowds in August
Haleakalā averages 70,083 recreation visits in August — 86% of what July, the peak month, draws. That crowd level sets the tone for parking, permits and lodging — book early and start days at dawn.
Weather & daylight
Days are pleasant (highs average 66°F), and nights stay mild (lows average 49°F). Average precipitation is 2.2″ for the month. Mid-month daylight runs 12.9 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 August.
What to pack for Haleakalā in August
Computed from the month's weather normals above — not a generic list.
- Packable rain jacket — 2.2″ of precipitation is normal this month
- Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month
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Also at their best in August
Other parks whose computed August verdict is a best window — same NPS × NOAA formula:
- Guadalupe Mountains in August — 28% of peak crowds, highs 84°F, score 80/100
- Lassen Volcanic in August — 56% of peak crowds, highs 78°F, score 77/100
- Bryce Canyon in August — 81% of peak crowds, highs 78°F, score 68/100
- Redwood in August — 85% of peak crowds, highs 66°F, score 67/100
Common questions
Is Haleakalā crowded in August?
Yes — August runs 86% of Haleakalā's peak, averaging 70,083 recreation visits (NPS, 2021–2025).
What is the weather like in Haleakalā in August?
Average highs of 66°F, lows of 49°F, 2.2″ of precipitation (NOAA 1991–2020 normals, HALEAKALA RS 338, HI US station).
What should I pack for Haleakalā in August?
Packable rain jacket; Sturdy broken-in footwear, navigation and a basic first-aid kit — the full weather-computed list is on this page.
See also: the best national parks to visit in August · Last verified 2026-09-24