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), days average 68°F with 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
- Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every 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 — 0% of peak crowds, highs 46°F, score 89/100
- Voyageurs in April — 0% of peak crowds, highs 49°F, score 88/100
Common questions
Is Gateway Arch crowded in April?
No — April is one of the quieter months: 32% of the July peak, averaging 150,887 visits (NPS, 2021–2025).
What is the weather like in Gateway Arch in April?
Average highs of 68°F, lows of 46°F, 4.5″ of precipitation (NOAA 1991–2020 normals, CAHOKIA ST LOUIS AP, IL US station).
What should I pack for Gateway Arch in April?
Rain shell + pack cover; Sturdy broken-in footwear, navigation and a basic first-aid kit — the full weather-computed list is on this page.
See also: the best national parks to visit in April · Last verified 2026-09-12