Lake Onalaska Weather Forecast

    • 66
    • 96

    Patchy Smoke

    • 64
    • 84

    Decreasing Clouds

    • 68
    • 88

    Mostly Sunny

    • 68
    • 89

    Rain Showers Likely

    • 64
    • 80

    Rain Showers Likely

    • 63
    • 82

    Slight Chance Thunderstorms

    • 62
    • 85

    Mostly Sunny

Today 27 Jul La Crosse

Sunny. Patchy smoke. Hot with Highs in the mid 90s. West Winds 10 to 15 Mph. Heat index Values up to 105.

Tonight 27 Jul La Crosse

Mostly clear this Evening, then becoming partly cloudy. Patchy smoke. Cooler with Lows in the mid 60s. North Winds 5 to 10 Mph. Heat index Values up to 100 early this evening.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Onalaska Temperature Statistics

July Temperature

La Crosse - La Crosse Regional Airport (2.5 miles)

  • Lowest 22 July, 2026

    52.6 °F

  • Average July

    76.5 °F

  • Highest 15 July, 2026

    95.6 °F

Climate (2021–2026)

La Crosse - La Crosse Regional Airport (2.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    40.8 °F

  • Average 2021–2026

    50.2 °F

  • Average High 2021–2026

    59.9 °F
Get WillyWeather+ to remove ads