The hottest month in Cincinnati is typically July, with daytime highs averaging around 30°C (86°F), based on 10 years of historical weather data. Overnight lows during this period average near 20.5°C (69°F).

What is the coldest month in Cincinnati?

The coldest month in Cincinnati is typically January, with overnight lows averaging around -4°C (25°F) and daytime highs near 4.1°C (39°F), based on 10 years of historical weather data. Freezing overnight temperatures are common during this month, so plan for icy conditions in the early morning.

Does Cincinnati have a rainy season?

Cincinnati doesn't have a sharply defined rainy season rainfall is fairly spread across the year based on 10 years of historical data. May is the wettest month on average (about 123 mm), while October is the driest (about 77 mm).

What's the best time of year to visit Cincinnati?

The best time to visit Cincinnati is typically September to October, when daytime highs average a comfortable 23.3°C (74°F). Rainfall during this window averages around 79 mm, one of the lighter, more comfortable stretches of the year. This is based on 10 years of historical weather data.

Is Cincinnati's air quality safe right now?

As of the latest reading, Cincinnati's air quality index (AQI) is 31, rated "Good", based on the nearest monitoring station. Air quality is considered satisfactory, with little to no health risk.

Atmospheric Details

Wind

11 km/h

ENE · Light Breeze

Humidity

91 %

High · feels muggy

UV Index

High

Visibility

10 km

Excellent

Pressure

984 hPa

Low · change likely

Dew Point

18°C

Somewhat humid

Today vs Normal

28°C0° below normal

The long-term average high for today is 28°C.

14 of the last 28 days with published data ran above normal.

It continues that pattern - today's forecast is also running below normal.

Red = above normal, blue = at or below · last 12 days

Air Quality

Moderate

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.

Health & Activity Advice

✅ Good for Outdoors

UV index is 6 today — moderate. Sunscreen is worth using for extended time outside, but no special precautions are needed for short trips.

Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.

Conditions are comfortable for outdoor activity at most points during the day today.