Lake Keomah State Park Weather Forecast

    • 67
    • 85

    Mostly Cloudy

    • 67
    • 83

    Rain Showers Likely

    • 67
    • 86

    Slight Chance Thunderstorms

    • 69
    • 87

    Chance Thunderstorms

    • 66
    • 87

    Chance Thunderstorms

    • 63
    • 83

    Slight Chance Thunderstorms

Today 7 Jul Mahaska

Patchy fog early this morning. Partly cloudy. Humid with Highs in the mid 80s. North Winds around 5 Mph.

Tonight 7 Jul Mahaska

Mostly cloudy. A slight chance of Showers and Thunderstorms in the Evening, then a chance of Showers and Thunderstorms after midnight. Humid with Lows in the upper 60s. South Winds around 5 Mph. Chance of rain 50 percent.

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Lake Keomah State Park Temperature Statistics

July Temperature

Oskaloosa, Oskaloosa Municipal Airport (5 miles)

  • Lowest 1 July, 2025

    63.5 °F

  • Average July

    78.8 °F

  • Highest 3 July, 2025

    92.3 °F

Climate (2020–Present)

Oskaloosa, Oskaloosa Municipal Airport (5 miles)

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  • Average Low 2020–2025

    43.4 °F

  • Average 2020–2025

    53.7 °F

  • Average High 2020–2025

    64.5 °F
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