St Louis, Missouri weather in April

Averages from 2021–2025 (150 days of record).

Average high: 67°F
Average low: 47°F
Rainy days: ~12 per month
Total precipitation: 5.6 in
Warmest recorded: 85°F
Coldest recorded: 26°F

Expect April days in St Louis, Missouri to top out around 67°F and cool to about 47°F overnight, with roughly 12 days of measurable rain across the month. In recent years April has ranged from 26°F to 85°F.

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