Weather Forecast and Radar for Gateway Arch National Park

Routes Running Nearby to Gateway Arch National Park

• The I-44 runs west from Gateway Arch National Park, in St. Louis, MO.

• The I-55 runs north-south beside Gateway Arch National Park, in St. Louis, MO.

• The I-64 runs east from Gateway Arch National Park, in St. Louis, MO.

• The I-70 runs east-west beside Gateway Arch National Park, in St. Louis, MO.

Weather in Gateway Arch National Park

Average temperatures can be as low as 25F (-4C) in January and as high as 89F (32C) in January. The onset of autumn in St. Louis signals crisper days with cooler temperatures. There are nearly as many rainy days as the spring during these months, though warm sunny days are not uncommon either.

Like most seasons in St. Louis, the weather is quite unpredictable, and it’s not unheard of for snow to fall as early as October.

Winter is the least popular time at Gateway Arch National Park, mostly due to the chilly temperatures and lack of sunny days. Daily highs range from the high 30s to the mid-40s, and lows can drop down to the 20s.

Fast Facts About Gateway Arch National Park

The park was established in 2018.

Major Cities Nearby Gateway Arch National Park

• Kansas City, Missouri (roughly 242 miles to the west)

This map shows the current & 7-day weather forecast, weather alerts, and weather radar for Gateway Arch National Park.