Chicago, Illinois weather in April

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

Average high: 57°F
Average low: 41°F
Rainy days: ~13 per month
Total precipitation: 3.3 in
Warmest recorded: 86°F
Coldest recorded: 23°F

Expect April days in Chicago, Illinois to top out around 57°F and cool to about 41°F overnight, with roughly 13 days of measurable rain across the month. In recent years April has ranged from 23°F to 86°F.

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Current Chicago, Illinois forecast → · Historical data by Open-Meteo (ERA5).