St Louis, Missouri weather in July

Averages from 2021–2025 (155 days of record).

Average high: 88°F
Average low: 71°F
Rainy days: ~14 per month
Total precipitation: 6.5 in
Warmest recorded: 100°F
Coldest recorded: 59°F

Expect July days in St Louis, Missouri to top out around 88°F and cool to about 71°F overnight, with roughly 14 days of measurable rain across the month. In recent years July has ranged from 59°F to 100°F.

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Current St Louis, Missouri forecast → · Historical data by Open-Meteo (ERA5).