Ottumwa Weather Forecast

    • 57
    • 77

    Rain Showers Likely

    • 50
    • 72

    Mostly Cloudy

    • 46
    • 77

    Partly Sunny

    • 44
    • 64

    Partly Sunny

    • 48
    • 71

    Mostly Sunny

    • 43
    • 68

    Mostly Sunny

Today 28 Sep Haakon

Mostly cloudy with a chance of Showers and Thunderstorms. Near steady temperature in the mid 70s. South Winds 15 to 20 Mph with Gusts up to 40 Mph. Chance of rain 40 percent.

Tonight 28 Sep Haakon

Mostly cloudy. Showers likely with a chance of Thunderstorms in the Evening, then a slight chance of Showers and Thunderstorms after midnight. Patchy fog after midnight. Lows in the upper 50s. Southeast Winds 10 to 15 Mph, becoming west 5 to 10 Mph after midnight. Gusts up to 25 Mph. Chance of rain 70 percent.

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Ottumwa Temperature Statistics

September Temperature

Philip, Philip Airport (17.4 miles)

  • Lowest 15 September, 2026

    46.7 °F

  • Average September

    68.1 °F

  • Highest 5 September, 2026

    100.7 °F

Climate (2021–2026)

Philip, Philip Airport (17.4 miles)

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  • Average Low 2021–2026

    35.9 °F

  • Average 2021–2026

    49.8 °F

  • Average High 2021–2026

    64 °F
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