January and February: 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.
March and April: We experience a visitation rush during spring break season, but it is less busy than summer. Our beautifully landscaped gardens have their first blooms of the year in March. In late March through April, the magnolia and redbud trees impress and delight visitors.
May: May is very busy with school field trips and group tours.
June and July: Summer is high season at Gateway Arch National Park. Come early, or come late (the crowds are light during the evening) and make sure to book your tram ticket in advance at gatewayarch.com. Extended hours start on Memorial Day Weekend, which will allow summer visitors more flexibility in their plans. The summer heat and humidity can be intense in St. Louis, but the visitor center under the Gateway Arch is air conditioned and comfortable no matter what the weather outside.
August and September: The crowds thin out as kids return to school.
November and December: Fall can be a busy time due to many group tours. The day after Thanksgiving is one of the busiest days of the year, so be sure to book your tickets in advance and arrive early if you plan to visit that day.
Please Note:
The drinking fountains are winterized every year to prevent freezing of the plumbing components. This is done around the first of Oct through the middle of May.
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
