St Louis, Missouri weather in October

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

Average high: 70°F
Average low: 51°F
Rainy days: ~8 per month
Total precipitation: 3.4 in
Warmest recorded: 87°F
Coldest recorded: 29°F

Expect October days in St Louis, Missouri to top out around 70°F and cool to about 51°F overnight, with roughly 8 days of measurable rain across the month. In recent years October has ranged from 29°F to 87°F.

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