15-Day Weather Forecast - Cincinnati

15-day weather forecast for Cincinnati: temperatures from 13°C (55°F) to 36°C (97°F). Average daily high 27°C (81°F) over the next 15 days.

Hourly Forecast by Day

Today·11 Sep
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Temperature · peaks at +27°C

15-Day Temperature Trend

27°19°TodaySep27°21°Tmrw32°19°Sun24°13°Mon33°14°Tue36°21°Wed36°22°Thu32°21°Fri22°17°Sat17°14°Sun17°14°Mon21°15°Tue26°13°Wed29°14°Thu21°15°Fri
Colour scale for daily high temperature bars

15-Day Weather Forecast

Updated just now
  • Date
    High / Low
  • Fri, Sep 11Today
    +27°/+19°
    feels +30°0 mm · 35%11 km/hUV 6 · Mod
    07:1519:52
  • Sat, Sep 12Tomorrow
    +27°/+21°
    feels +31°143.7 mm · 33%30 km/hUV 4 · Mod
    07:1619:51
  • Sun, Sep 13Sun
    +32°/+19°
    feels +34°0.5 mm · 25%18 km/hUV 6 · Hi
    07:1719:49
  • Mon, Sep 14Mon
    +24°/+13°
    feels +24°1.9 mm · 16%14 km/hUV 6 · Hi
    07:1819:47
  • Tue, Sep 15Tue
    +33°/+14°
    feels +36°2.8 mm · 3%9 km/hUV 6 · Hi
    07:1919:46
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  • Wed, Sep 16Wed
    +36°/+21°
    feels +39°5.1 mm · 13%9 km/hUV 6 · Hi
    07:2019:44
  • Thu, Sep 17Thu
    +36°/+22°
    feels +40°3.0 mm · 43%17 km/hUV 6 · Mod
    07:2119:43
  • Fri, Sep 18Fri
    +32°/+21°
    feels +34°7.5 mm · 28%14 km/hUV 6 · Mod
    07:2219:41
  • Sat, Sep 19Sat
    +22°/+17°
    feels +25°1.2 mm · 16%13 km/hUV 1 · Low
    07:2319:39
  • Sun, Sep 20Sun
    +17°/+14°
    feels +16°10.5 mm · 11%15 km/hUV 2 · Low
    07:2419:38
  • Mon, Sep 21Mon
    +17°/+14°
    feels +18°14.4 mm · 12%9 km/hUV 2 · Low
    07:2419:36
  • Tue, Sep 22Tue
    +21°/+15°
    feels +21°0 mm · 10%11 km/hUV 4 · Mod
    07:2519:35
  • Wed, Sep 23Wed
    +26°/+13°
    feels +28°0 mm · 26%5 km/hUV 6 · Mod
    07:2619:33
  • Thu, Sep 24Thu
    +29°/+14°
    feels +29°0 mm · 29%7 km/hUV 5 · Mod
    07:2719:31
  • Fri, Sep 25Fri
    +21°/+15°
    feels +21°0 mm · 24%16 km/hUV 2 · Low
    07:2819:30

Weather Insight

Cincinnati's 15-day outlook ranges from a low of 13°C to a high of 36°C, with an average daytime high near 27°C. That's 1° below the long-term average high of 28°C for this time of year. It continues a recent pattern — 14 of the last 28 days with published data have run cooler than normal. Air quality is currently good (AQI 49), with no notable outdoor health concerns.

Today vs Normal

27°C-1° 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.

2026-08-28: 29°C29°2026-08-29: 30°C30°2026-08-30: 32°C32°2026-08-31: 33°C33°2026-09-01: 34°C34°2026-09-02: 35°C35°2026-09-03: 35°C35°2026-09-04: 35°C35°2026-09-05: 32°C32°2026-09-06: 27°C27°2026-09-07: 29°C29°2026-09-08: 31°C31°

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

Air Quality

Air Quality
Good

Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.

Extended Outlook for Cincinnati

Over the next 15 days, Cincinnati is forecast to see temperatures ranging from 12°C to 37°C, averaging a daily high of 27°C. The extended outlook indicates significant rainfall totalling 190.6 mm spread across 10 days. Conditions are suitable for most outdoor activities; carry an umbrella on days with showers.