Gateway Arch National Park in July
In July, Gateway Arch National Park averages a high of 89°F and a low of 69°F, with 3.7 inches of precipitation (rain plus melted snow). About 491,000 people visit, the busiest month. Days are 14 hours 37 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 89° / 69°F
- Precipitation
- 3.7in
- Snow
- –in
- Daylight
- 14h 37m
- Visitors
- 491,000
- Crowds
- Very busy
Best months for weather and crowds instead: March (moderate), October (quiet) and November (quiet).
Weather 1991–2020 averages at Cahokia St Louis AP, IL, 3.7 miles from the park's center, 413 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in July
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Ozark National Scenic Riverways | 90° / 65° | Very busy | Hot |
| Mammoth Cave National Park | 91° / 68° | Very busy | Very hot |
| Buffalo National River | 85° / 66° | Very busy | Hot |
| Indiana Dunes National Park | 82° / 64° | Very busy | Hot |
| Hot Springs National Park | 93° / 72° | Busy | Very hot |
Closures, reservations and alerts: Gateway Arch National Park on nps.gov
All twelve months at Gateway Arch · National parks to visit in July