Gateway Arch National Park weather in March
March in Gateway Arch National Park: cool, rainy, with clean air — a great time to visit.
#6 of 12 months in Gateway Arch National Park · #266 of 604 destinations to visit in March · comfort 77/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Gateway Arch National Park climate normals — March
| Daytime high | 14°C / 58°F | 🙂 cool |
|---|---|---|
| Nighttime low | 4°C / 38°F | |
| Feels like (high) | 12°C / 54°F | |
| Rainfall | 133 mm / 5.2 in | 🌧 rainy |
| Rainy days | 13 days | |
| Humidity | 64% | 💧 humid |
| Dew point | 1°C / 33°F | |
| Sunshine | 7.4 h/day | |
| Daylight | 12 h | |
| Wind | 20 km/h / 12 mph | |
| Snowfall | 1.3 cm / 0.5 in | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Gateway Arch National Park?
Loading map…
Gateway Arch National Park in March — FAQ
- Is March a good time to visit Gateway Arch National Park?
- March in Gateway Arch National Park: cool, rainy, with clean air — a great time to visit. It ranks #6 of 12 months for Gateway Arch National Park on SeasonMap's comfort score (77/100).
- What is the weather like in Gateway Arch National Park in March?
- In March, Gateway Arch National Park averages a daily high of 14.4°C and a low of 3.5°C, with about 132.7 mm of rain over roughly 13.2 rainy days.
- What is the air quality in Gateway Arch National Park in March?
- Gateway Arch National Park has a mean US Air Quality Index of about 42 in March.
- Does it snow in Gateway Arch National Park in March?
- Gateway Arch National Park sees roughly 1.3 cm of snowfall in March.