Gateway Arch National Park

Gateway Arch National Park commemorates President Jefferson’s vision of a continental nation, the individuals and cultural groups who helped shape its history, St. Louis’ role in westward expansion, and Dred and Harriet Scott, who sued for their freedom in the Old Courthouse.

Weather & conditions

Normal Daily Mean Temperature (in degrees Fahrenheit)* January – 29.3 February – 33.9 March – 45.1 April – 56.7 May – 66.1 June – 75.4 July – 79.8 August – 77.6 September – 70.2 October – 58.4 November – 46.2 December – 33.9 Average Percent of Days with Sunshine* January – 50% February – 52% March – 54% April – 56% May – 59% June – 66% July – 68% August – 65% September – 63% October – 60% November – 46% December – 53% *Source: National Oceanic and Atmospheric Administration