Gateway Arch in June: Crowds, Weather & What to Pack

Shoulder · VisitWhen score 71/100 · #8 of 12 months

June is a solid shoulder-season month to visit Gateway Arch National Park: crowds run 49% of the July peak (234,103 average visits), days average 86°F with 14.9 hours of daylight. Computed from NPS and NOAA data.

Crowds in June

Gateway Arch averages 234,103 recreation visits in June — 49% of what July, the peak month, draws. Plan lodging and entries with that in mind.

Weather & daylight

Expect warm days (highs average 86°F), and nights stay mild (lows average 65°F). This is one of the wetter months (4.4″ of precipitation on average). Mid-month daylight runs 14.9 hours.

NOAA 1991–2020 monthly normals, station CAHOKIA ST LOUIS AP, IL US (4 mi from park coordinates, 413 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of June.

What to pack for Gateway Arch in June

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

• Sun protection and 2L+ water per person — highs average 86°F
• Rain shell + pack cover — 4.4″ of precipitation is normal this month
• Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month

Looking for a better window? The computed best months for Gateway Arch are April and September.

Common questions

See also: the best national parks to visit in June · Last verified 2026-07-16