Lake Keomah State Park Weather Forecast

    • 37
    • 56

    Breezy

    • 35
    • 59

    Sunny

    • 34
    • 60

    Mostly Sunny

    • 44
    • 61

    Mostly Cloudy

    • 48
    • 59

    Chance Rain Showers

    • 50
    • 64

    Chance Rain Showers

    • 46
    • 66

    Chance Rain Showers

Today 21 Oct Mahaska

Mostly cloudy and Windy, cooler. Near steady temperature in the mid 50s. Northwest Winds 25 to 30 Mph with Gusts up to 40 Mph.

Tonight 21 Oct Mahaska

Mostly Cloudy, then becoming partly cloudy this Evening, then becoming clear. Breezy with Lows in the upper 30s. Northwest Winds 15 to 25 Mph with Gusts up to 40 Mph, Diminishing to 10 to 15 Mph with Gusts up to 25 Mph after midnight.

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Lake Keomah State Park Temperature Statistics

October Temperature

Oskaloosa, Oskaloosa Municipal Airport (5 miles)

  • Lowest 19 October, 2025

    42.1 °F

  • Average October

    66.4 °F

  • Highest 3 October, 2025

    90.9 °F

Climate (2020–Present)

Oskaloosa, Oskaloosa Municipal Airport (5 miles)

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  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    54 °F

  • Average High 2020–2025

    64.7 °F
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