Ottumwa Weather Forecast

    • 63
    • 89

    Slight Chance Thunderstorms

    • 61
    • 91

    Partly Sunny

    • 63
    • 89

    Rain Showers Likely

    • 60
    • 79

    Rain Showers Likely

    • 62
    • 81

    Chance Thunderstorms

    • 62
    • 84

    Chance Rain Showers

Today 16 Sep Wapello

Partly sunny with a slight chance of Showers and Thunderstorms. Highs in the upper 80s. Southeast Winds around 5 Mph. Chance of rain 20 percent.

Tonight 16 Sep Wapello

Mostly cloudy in the Evening, then becoming partly cloudy. A slight chance of Showers and Thunderstorms. Humid with Lows in the lower 60s. East Winds around 5 Mph. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Ottumwa Temperature Statistics

September Temperature

Ottumwa Regional Airport (5.6 miles)

  • Lowest 7 September, 2025

    41 °F

  • Average September

    66.2 °F

  • Highest 13 September, 2025

    96.1 °F

Climate (2020–Present)

Ottumwa Regional Airport (5.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    41.8 °F

  • Average 2020–2025

    52.2 °F

  • Average High 2020–2025

    62.6 °F
Get WillyWeather+ to remove ads