Onalaska Weather Forecast

    • 70
    • 92

    Chance Thunderstorms

    • 72
    • 93

    Slight Chance Thunderstorms

    • 73
    • 91

    Chance Thunderstorms

    • 73
    • 90

    Chance Thunderstorms

    • 71
    • 90

    Chance Thunderstorms

    • 70
    • 90

    Chance Thunderstorms

Today 19 Sep Polk

Mostly sunny with a chance of Showers and Thunderstorms. Highs in the lower 90s. Northwest Winds around 5 Mph, becoming east around 5 Mph in the afternoon. Chance of rain 40 percent.

Tonight 19 Sep Polk

Partly cloudy. Lows in the upper 60s. Southeast Winds around 5 Mph.

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Onalaska Temperature Statistics

September Temperature

Huntsville, Huntsville Municipal Airport (28 miles)

  • Lowest 9 September, 2025

    61 °F

  • Average September

    80.4 °F

  • Highest 4 September, 2025

    95 °F

Climate (2020–Present)

Huntsville, Huntsville Municipal Airport (28 miles)

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  • Average Low 2020–2025

    60.9 °F

  • Average 2020–2025

    70.8 °F

  • Average High 2020–2025

    81.1 °F
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