Cincinnati, Ohio weather in May

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

Average high: 74°F
Average low: 55°F
Rainy days: ~14 per month
Total precipitation: 4.4 in
Warmest recorded: 90°F
Coldest recorded: 36°F

Expect May days in Cincinnati, Ohio to top out around 74°F and cool to about 55°F overnight, with roughly 14 days of measurable rain across the month. In recent years May has ranged from 36°F to 90°F.

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Current Cincinnati, Ohio forecast → · Historical data by Open-Meteo (ERA5).