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

Best window · VisitWhen score 78/100 · #3 of 12 months

April is one of the best months of the year to visit Gateway Arch National Park: crowds run 32% of the July peak (150,887 average visits). Weather: highs average 68°F and lows 46°F, with 4.5″ of precipitation and 13.2 hours of daylight. Computed from NPS and NOAA data.

Crowds in April

Gateway Arch averages 150,887 recreation visits in April — 32% of what July, the peak month, draws. That crowd level sets the tone for parking, permits and lodging.

Weather & daylight

Days are pleasant (highs average 68°F), and nights stay mild (lows average 46°F). This is one of the wetter months (4.5″ of precipitation on average). Mid-month daylight runs 13.2 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 April.

What to pack for Gateway Arch in April

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

• Rain shell + pack cover — 4.5″ of precipitation is normal this month
• Waterproof boots — plus navigation and a basic first-aid kit — 4.5″ of rain is normal this month

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Also at their best in April

Other parks whose computed April verdict is a best window — same NPS × NOAA formula:

• Theodore Roosevelt in April — 7% of peak crowds, highs 56°F, score 92/100
• Badlands in April — 16% of peak crowds, highs 60°F, score 90/100
• Lake Clark in April — under 1% of peak crowds, highs 46°F, score 89/100
• Voyageurs in April — under 1% of peak crowds, highs 49°F, score 88/100

Common questions

See also: the best national parks to visit in April · Last verified 2026-09-24