St. Louis weather in July
July in St. Louis: hot, rainy — a great time to visit.
#9 of 12 months in St. Louis · #624 of 897 destinations to visit in July · comfort 70/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on St. Louis in July
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St. Louis climate normals — July
| Daytime high | 32°C / 89°F | 🥵 hot |
|---|---|---|
| Nighttime low | 22°C / 72°F | |
| Rainfall | 115 mm / 4.5 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 66% | 💧 humid |
| Dew point | 20°C / 67°F | |
| Sunshine | 12 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.
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St. Louis in July — FAQ
- Is July a good time to visit St. Louis?
- July in St. Louis: hot, rainy — a great time to visit. It ranks #9 of 12 months for St. Louis on SeasonMap's comfort score (70/100).
- What is the weather like in St. Louis in July?
- In July, St. Louis averages a daily high of 31.8°C and a low of 22.2°C, with about 115 mm of rain over roughly 11.2 rainy days.
- What is the air quality in St. Louis in July?
- St. Louis has a mean US Air Quality Index of about 73 in July.