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

Shoulder · VisitWhen score 76/100 · #5 of 12 months

March is a solid shoulder-season month to visit Gateway Arch National Park: crowds run 35% of the July peak (166,103 average visits). Weather: highs average 56°F and lows 36°F, with 3.3″ of precipitation and 11.9 hours of daylight. Computed from NPS and NOAA data.

Bring for Gateway Arch in March

Warm mid-layer (fleece or light puffy)See it on AmazonWhy: mornings average 36°F.
Packable rain jacketSee it on AmazonWhy: 3.3″ of precipitation is normal this month.

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looking up at the curve of the Gateway Arch against the sky — Gateway Arch National Park — photo: NPS Photo/Sue Ford (public-domain NPS media)

Crowds in March

Gateway Arch averages 166,103 recreation visits in March — 35% of what July, the peak month, draws. Plan lodging and entries with that in mind.

Average visits (March)

166,103 (mean 2021–2025, NPS)

Share of the year

8.3% of annual visitation

vs. peak (July)

35%

Weather & daylight

Expect cool days (highs average 56°F), and mornings are chilly (lows average 36°F). Average precipitation is 3.3″ for the month. Mid-month daylight runs 11.9 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 March.

What to pack for Gateway Arch in March

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

Warm mid-layer (fleece or light puffy) — mornings average 36°F
Packable rain jacket — 3.3″ 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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Looking for a better window? The computed best months for Gateway Arch are April and September.

Also at their best in March

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

Great Basin in March — 10% of peak crowds, highs 48°F, score 81/100
Shenandoah in March — 23% of peak crowds, highs 55°F, score 78/100
Wind Cave in March — 15% of peak crowds, highs 50°F, score 78/100
Mesa Verde in March — 17% of peak crowds, highs 47°F, score 77/100

Common questions

Is Gateway Arch crowded in March?

No — March is one of the quieter months: 35% of the July peak, averaging 166,103 visits (NPS, 2021–2025).

What is the weather like in Gateway Arch in March?

Average highs of 56°F, lows of 36°F, 3.3″ of precipitation (NOAA 1991–2020 normals, CAHOKIA ST LOUIS AP, IL US station).

What should I pack for Gateway Arch in March?

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.

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