Mount Rainier in August: Crowds, Weather & What to Pack
Peak crowds · VisitWhen score 65/100 · #5 of 12 months
August is peak season — expect the year's biggest crowds at Mount Rainier National Park: crowds run 95% of the July peak (398,276 average visits), days average 64°F with 14.3 hours of daylight. Computed from NPS and NOAA data.
Crowds in August
Mount Rainier averages 398,276 recreation visits in August — 95% 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 64°F), and nights stay mild (lows average 45°F). It is typically dry (1.6″ of precipitation). Mid-month daylight runs 14.3 hours.
NOAA 1991–2020 monthly normals, station RAINIER PARADISE RS, WA US (4 mi from park coordinates, 5,427 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of August.
What to pack for Mount Rainier in August
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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Want quieter or kinder conditions? The computed best months for Mount Rainier are May and June.
Also at their best in August
Other parks whose computed August verdict is a best window — same NPS × NOAA formula:
- Big Bend in August — 18% of peak crowds, highs 84°F, score 83/100
- 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
Common questions
Is Mount Rainier crowded in August?
Yes — August runs 95% of Mount Rainier's peak, averaging 398,276 recreation visits (NPS, 2021–2025).
What is the weather like in Mount Rainier in August?
Average highs of 64°F, lows of 45°F, 1.6″ of precipitation (NOAA 1991–2020 normals, RAINIER PARADISE RS, WA US station).
What should I pack for Mount Rainier in August?
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 2026-09-12