Gateway Arch National Park weather in June
June in Gateway Arch National Park: hot, a little rain — a great time to visit.
#7 of 12 months in Gateway Arch National Park · #368 of 604 destinations to visit in June · comfort 77/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Gateway Arch National Park climate normals — June
| Daytime high | 30°C / 86°F | 🥵 hot |
|---|---|---|
| Nighttime low | 20°C / 67°F | |
| Feels like (high) | 33°C / 91°F | |
| Rainfall | 79 mm / 3.1 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 57% | 🍃 comfortable |
| Dew point | 15°C / 60°F | |
| Sunshine | 12.1 h/day | |
| Daylight | 14.8 h | |
| Wind | 14 km/h / 9 mph | |
| Air quality (US AQI) | 68 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Gateway Arch National Park?
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Gateway Arch National Park in June — FAQ
- Is June a good time to visit Gateway Arch National Park?
- June in Gateway Arch National Park: hot, a little rain — a great time to visit. It ranks #7 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 June?
- In June, Gateway Arch National Park averages a daily high of 30.2°C and a low of 19.6°C, with about 78.8 mm of rain over roughly 9.8 rainy days.
- What is the air quality in Gateway Arch National Park in June?
- Gateway Arch National Park has a mean US Air Quality Index of about 68 in June.