Gateway Arch National Park in March
In March, Gateway Arch National Park averages a high of 56°F and a low of 36°F, with 3.3 inches of precipitation (rain plus melted snow). About 219,000 people visit, the 5th busiest of 12 (moderate). Days are 11 hours 50 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 56° / 36°F
- Precipitation
- 3.3in
- Snow
- –in
- Daylight
- 11h 50m
- Visitors
- 219,000
- Crowds
- Moderate
March is one of the best months to visit: mild weather with moderate 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 March
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Ozark National Scenic Riverways | 60° / 32° | Quiet | Mild, wet |
| Mammoth Cave National Park | 62° / 40° | Busy | Mild, wet |
| Buffalo National River | 57° / 35° | Moderate | Mild, wet |
| Indiana Dunes National Park | 46° / 30° | Quiet | Cool |
| Hot Springs National Park | 65° / 42° | Busy | Mild, wet |
Closures, reservations and alerts: Gateway Arch National Park on nps.gov
All twelve months at Gateway Arch · National parks to visit in March