Gateway Arch National Park in October
In October, Gateway Arch National Park averages a high of 69°F and a low of 46°F, with 3.1 inches of precipitation (rain plus melted snow). About 144,000 people visit, the 8th busiest of 12 (quiet). Days are 11 hours 07 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 69° / 46°F
- Precipitation
- 3.1in
- Snow
- –in
- Daylight
- 11h 7m
- Visitors
- 144,000
- Crowds
- Quiet
October is one of the best months to visit: mild weather with quiet crowds.
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 October
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Ozark National Scenic Riverways | 71° / 41° | Quiet | Mild |
| Mammoth Cave National Park | 74° / 49° | Moderate | Mild |
| Buffalo National River | 67° / 48° | Moderate | Mild, wet |
| Indiana Dunes National Park | 62° / 45° | Moderate | Mild, wet |
| Hot Springs National Park | 75° / 52° | Moderate | Mild, wet |
Closures, reservations and alerts: Gateway Arch National Park on nps.gov
All twelve months at Gateway Arch · National parks to visit in October