Cincinnati, Ohio weather in December

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

Average high: 46°F
Average low: 32°F
Rainy days: ~11 per month
Total precipitation: 3.4 in
Warmest recorded: 70°F
Coldest recorded: -10°F

Expect December days in Cincinnati, Ohio to top out around 46°F and cool to about 32°F overnight, with roughly 11 days of measurable rain across the month. In recent years December has ranged from -10°F to 70°F.

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