Gateway Arch National Park weather in July
July in Gateway Arch National Park: sweltering, rainy — a good time to visit.
#12 of 12 months in Gateway Arch National Park · #461 of 604 destinations to visit in July · comfort 61/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Gateway Arch National Park climate normals — July
| Daytime high | 32°C / 89°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 22°C / 72°F | |
| Feels like (high) | 36°C / 97°F | |
| Rainfall | 103 mm / 4.1 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 66% | 💧 humid |
| Dew point | 20°C / 67°F | |
| Sunshine | 12.1 h/day | |
| Daylight | 14.6 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 73 | 🙂 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 July — FAQ
- Is July a good time to visit Gateway Arch National Park?
- July in Gateway Arch National Park: sweltering, rainy — a good time to visit. It ranks #12 of 12 months for Gateway Arch National Park on SeasonMap's comfort score (61/100).
- What is the weather like in Gateway Arch National Park in July?
- In July, Gateway Arch National Park averages a daily high of 31.8°C and a low of 22.2°C, with about 102.9 mm of rain over roughly 12 rainy days.
- What is the air quality in Gateway Arch National Park in July?
- Gateway Arch National Park has a mean US Air Quality Index of about 73 in July.