Mount Rainier in May: Crowds, Weather & What to Pack
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May is one of the best months of the year to visit Mount Rainier National Park: crowds run 20% of the July peak (85,473 average visits). Weather: highs average 48°F and lows 33°F, with 5.1″ of precipitation and 15 hours of daylight. Roads and services are only partly open this month — see the access note below. Computed from NPS and NOAA data.
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Bring for Mount Rainier in May
- Warm mid-layer (fleece or light puffy)See it on AmazonWhy: mornings average 33°F.
- Rain shell + pack coverSee it on AmazonWhy: 5.1″ of precipitation is normal this month.
- Waterproof boots — plus navigation and a basic first-aid kitSee it on AmazonWhy: 5.1″ of rain is normal this month.
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Crowds in May
Mount Rainier averages 85,473 recreation visits in May — 20% of what July, the peak month, draws. That crowd level sets the tone for parking, permits and lodging — crowds are thin by this park's standards.
Weather & daylight
Daytime stays cool (highs average 48°F), and mornings are chilly (lows average 33°F). This is one of the wetter months (5.1″ of precipitation on average). Mid-month daylight runs 15 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 May.
What to pack for Mount Rainier in May
Computed from the month's weather normals above — not a generic list.
- Warm mid-layer (fleece or light puffy) — mornings average 33°F
- Rain shell + pack cover — 5.1″ of precipitation is normal this month
- Waterproof boots — plus navigation and a basic first-aid kit — 5.1″ of rain is normal this month
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Also at their best in May
Other parks whose computed May verdict is a best window — same NPS × NOAA formula:
- Lake Clark in May — 7% of peak crowds, highs 59°F, score 96/100
- North Cascades in May — 11% of peak crowds, highs 69°F, score 96/100
- Katmai in May — 1% of peak crowds, highs 52°F, score 95/100
- Gates of the Arctic in May — 12% of peak crowds, highs 56°F, score 94/100
Common questions
Is Mount Rainier crowded in May?
No — May is one of the quieter months: 20% of the July peak, averaging 85,473 visits (NPS, 2021–2025).
What is the weather like in Mount Rainier in May?
Average highs of 48°F, lows of 33°F, 5.1″ of precipitation (NOAA 1991–2020 normals, RAINIER PARADISE RS, WA US station).
What should I pack for Mount Rainier in May?
Warm mid-layer (fleece or light puffy); Rain shell + pack cover; Waterproof boots — plus navigation and a basic first-aid kit — the full weather-computed list is on this page.
Is everything open at Mount Rainier in May?
Sunrise and Stevens Canyon roads are typically open only July–September; the road to Paradise is plowed and open year-round (carry chains in winter). Always check the park's live NPS alerts for current conditions.
See also: the best national parks to visit in May · Last verified 2026-09-24