Gateway Arch National Park in January

Gateway Arch National Park · crowd + weather almanac

January crowd level quietest stretch

about 39,000 visits in a typical January

The quietest month of the year · median of 2016–2025 official NPS counts

January is the quietest month of the year at Gateway Arch National Park: about 39,000 recreation visits in a typical January (2% of the year's traffic, and 8% of what the peak month, July, sees). This is the off-season — the park is at or near its quietest. Weather-wise, January days at the Cahokia, IL station typically top out around 41°F with nights near 22°F, and about 2.7 inches of precipitation falls over the month. The station's long-term normal includes about 5 inches of January snowfall.

Typical January: 39,056 recreation visits (median 2016–2025); the range across those years ran 16,552 (2016) to 81,397 (2023).
Busier than 0 of the other 11 months.
1991–2020 January normals at Cahokia, IL: high 41°F, low 22°F, 2.67 in precipitation, 4.9 in snow.

Typical (median) monthly recreation visits at Gateway Arch National Park, 2016–2025. January highlighted. Source: NPS Visitor Use Statistics.

January weather (1991–2020 normals)

Typical daytime high	41°F
Typical overnight low	22°F
Precipitation (monthly normal)	2.67 in
Snowfall (monthly normal)	4.9 in
Measured at	Cahokia, IL (USC00111160), 4.0 mi from the park reference point, elev. 400 ft

Every month at Gateway Arch

Month	Typical visits	Crowds	High / Low	Precip
January	39,056	quietest stretch	41°F / 22°F	2.7 in
February	51,742	quietest stretch	46°F / 26°F	2.3 in
March	121,804	quiet	56°F / 35°F	3.5 in
April	109,703	quiet	68°F / 45°F	4.6 in
May	140,929	quiet	76°F / 56°F	4.8 in
June	209,875	moderate	85°F / 65°F	4.3 in
July	470,489	busiest stretch	88°F / 69°F	5.0 in
August	213,218	moderate	87°F / 67°F	3.1 in
September	124,285	quiet	80°F / 59°F	3.4 in
October	117,702	quiet	70°F / 46°F	3.0 in
November	89,065	quiet	56°F / 35°F	3.3 in
December	70,685	quiet	45°F / 27°F	2.8 in

Official NPS page for Gateway Arch →