Glacier in June: Crowds, Weather & What to Pack

Best window · VisitWhen score 73/100 · #2 of 12 months

June is one of the best months of the year to visit Glacier National Park: crowds run 72% of the July peak (551,415 average visits), days average 63°F with 16.1 hours of daylight. Computed from NPS and NOAA data.

Partial access: 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. Current NPS conditions →

Crowds in June

Glacier averages 551,415 recreation visits in June — 72% of what July, the peak month, draws. Trailheads and parking fill accordingly — book early and start days at dawn.

Average visits (June)

551,415 (mean 2021–2025, NPS)

Share of the year

18.1% of annual visitation

vs. peak (July)

72%

Weather & daylight

Days are mild (highs average 63°F), and mornings are chilly (lows average 42°F). Average precipitation is 3.1″ for the month. Mid-month daylight runs 16.1 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 June.

What to pack for Glacier in June

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

Warm mid-layer (fleece or light puffy) — mornings average 42°F
Packable rain jacket — 3.1″ 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)

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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
Big Bend in June — 26% of peak crowds, highs 87°F, score 81/100

Common questions

Is Glacier crowded in June?

Yes — June runs 72% of Glacier's peak, averaging 551,415 recreation visits (NPS, 2021–2025).

What is the weather like in Glacier in June?

Average highs of 63°F, lows of 42°F, 3.1″ of precipitation (NOAA 1991–2020 normals, ST. MARY 1 SSW, MT US station).

What should I pack for Glacier in June?

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 June?

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 June · Last verified 2026-09-12