Oskaloosa Weather Forecast

    • 31
    • 41

    Increasing Clouds

    • 35
    • 50

    Partly Sunny

    • 32
    • 48

    Mostly Cloudy

    • 43
    • 52

    Mostly Cloudy

    • 34
    • 62

    Mostly Cloudy

    • 31
    • 48

    Mostly Cloudy

Today 21 Dec Mahaska

Sunny. Highs in the lower 40s. South Winds 5 to 10 Mph.

Tonight 21 Dec Mahaska

Mostly cloudy. Near steady temperature in the lower 30s. South Winds 10 to 15 Mph.

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Oskaloosa Temperature Statistics

December Temperature

Oskaloosa, Oskaloosa Municipal Airport (8.7 miles)

  • Lowest 14 December, 2025

    -9.4 °F

  • Average December

    24 °F

  • Highest 18 December, 2025

    46.2 °F

Climate (2020–Present)

Oskaloosa, Oskaloosa Municipal Airport (8.7 miles)

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  • Average Low 2020–2025

    43.6 °F

  • Average 2020–2025

    53.9 °F

  • Average High 2020–2025

    64.7 °F
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