Gateway Arch in October: Crowds, Weather & What to Pack
Best window · VisitWhen score 80/100 · #2 of 12 months
October is one of the best months of the year to visit Gateway Arch National Park: crowds run 26% of the July peak (125,733 average visits). Weather: highs average 69°F and lows 46°F, with 3.1″ of precipitation and 11.2 hours of daylight. Computed from NPS and NOAA data.
Crowds in October
Gateway Arch averages 125,733 recreation visits in October — 26% 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 69°F), and nights stay mild (lows average 46°F). Average precipitation is 3.1″ for the month. Mid-month daylight runs 11.2 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 October.
What to pack for Gateway Arch in October
Computed from the month's weather normals above — not a generic list.
- 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
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Also at their best in October
Other parks whose computed October verdict is a best window — same NPS × NOAA formula:
- Badlands in October — 27% of peak crowds, highs 63°F, score 81/100
- Isle Royale in October — 2% of peak crowds, highs 51°F, score 81/100
- Wind Cave in October — 25% of peak crowds, highs 61°F, score 81/100
- Lassen Volcanic in October — 35% of peak crowds, highs 59°F, score 78/100
Common questions
Is Gateway Arch crowded in October?
No — October is one of the quieter months: 26% of the July peak, averaging 125,733 visits (NPS, 2021–2025).
What is the weather like in Gateway Arch in October?
Average highs of 69°F, lows of 46°F, 3.1″ of precipitation (NOAA 1991–2020 normals, CAHOKIA ST LOUIS AP, IL US station).
What should I pack for Gateway Arch in October?
Packable rain jacket; 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 October · Last verified 2026-09-24