Glacier in May: Crowds, Weather & What to Pack
Shoulder · VisitWhen score 63/100 · #6 of 12 months
May is a solid shoulder-season month to visit Glacier National Park: crowds run 27% of the July peak (202,281 average visits), days average 56°F with 15.2 hours of daylight. Computed from NPS and NOAA data.
Crowds in May
Glacier averages 202,281 recreation visits in May — 27% of what July, the peak month, draws. That crowd level sets the tone for parking, permits and lodging.
Weather & daylight
Daytime stays cool (highs average 56°F), and mornings are chilly (lows average 35°F). Average precipitation is 2.8″ for the month. Mid-month daylight runs 15.2 hours.
NOAA 1991–2020 monthly normals, station ST. MARY 1 SSW, MT US (17 mi from park coordinates, 4,555 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of May.
What to pack for Glacier in May
Computed from the month's weather normals above — not a generic list.
- Warm mid-layer (fleece or light puffy) — mornings average 35°F
- Packable rain jacket — 2.8″ of precipitation is normal this month
- Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month
- Bear spray — recommended by the park in grizzly country (check current park regulations before you carry)
Want quieter or kinder conditions? The computed best months for Glacier are June and September.
Common questions
Is Glacier crowded in May?
No — May is one of the quieter months: 27% of the July peak, averaging 202,281 visits (NPS, 2021–2025).
What is the weather like in Glacier in May?
Average highs of 56°F, lows of 35°F, 2.8″ of precipitation (NOAA 1991–2020 normals, ST. MARY 1 SSW, MT US station).
What should I pack for Glacier in May?
Warm mid-layer (fleece or light puffy); Packable rain jacket; Sturdy broken-in footwear, navigation and a basic first-aid kit — the full weather-computed list is on this page.
Is everything open at Glacier in May?
Going-to-the-Sun Road's alpine section typically opens fully late June–early July and closes in mid-October; lower valleys stay accessible year-round. Always check the park's live NPS alerts for current conditions.
See also: the best national parks to visit in May · Last verified 2026-07-16