• Looking up at the Gateway Arch

    Jefferson

    National Expansion Memorial Missouri

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  • Pedestrian Access to the Gateway Arch From Downtown

    Pedestrian traffic on the Chestnut bridge will be closed as of today Monday, March 31, 2014. This will leave the Pine St. bridge as the Arch grounds point of entry to and from the city. The new Walnut St. bridge will open next Friday to foot traffic.

Weather

Summer is high season at the Jefferson National Expansion Memorial. Come early, or come late (the crowds are light during the evening). Make a day of it -- plan a visit to another of the city's terrific attractions. During August and September, the crowds thin out as kids return to school. Fall is a busy time due to many group tours. The day after Thanksgiving is one of the busiest days so be sure to arrive early!

Winter is a perfect time to visit! There are no lines for the trams, no waiting for movies, and the weather is surprisingly mild. Prolonged periods of extremely cold weather are rare, and in fact, records show that the temperature doesn't get lower than 32 degrees more than 25 days throughout the winter!

When spring returns, so do the group tours. In May and early June, there are light crowds with minimal waiting. The weather is mild and the extended hours give your plans flexibility.


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







Did You Know?

Black dog

Meriwether Lewis took his Newfoundland dog Seaman on the Lewis and Clark expedition? Seaman made the entire trip with the Corps and is credited with waking the members when a bison entered the camp and almost trampled them. Click here to learn more about Lewis and Clark. More...