Lake Keomah State Park Weather Forecast

    • 43
    • 63

    Chance Rain Showers

    • 40
    • 61

    Mostly Sunny

    • 37
    • 61

    Slight Chance Thunderstorms

    • 36
    • 59

    Partly Sunny

    • 41
    • 62

    Mostly Sunny

    • 46
    • 70

    Slight Chance Rain Showers

    • 47
    • 71

    Slight Chance Thunderstorms

Today 28 Apr Mahaska

Partly sunny with a chance of Sprinkles. Near steady temperature in the lower 60s. Northwest Winds 5 to 10 Mph.

Tonight 28 Apr Mahaska

Mostly cloudy. A chance of Showers this Evening, then a chance of Sprinkles after midnight. Lows in the lower 40s. North Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Keomah State Park Temperature Statistics

April Temperature

Oskaloosa, Oskaloosa Municipal Airport (5 miles)

  • Lowest 19 April, 2026

    33.8 °F

  • Average April

    54.1 °F

  • Highest 17 April, 2026

    84.6 °F

Climate (2021–Present)

Oskaloosa, Oskaloosa Municipal Airport (5 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    54.2 °F

  • Average High 2021–2026

    65.1 °F
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