Lannon Lake Weather Forecast

    • 70
    • 91

    Rain Showers Likely

    • 66
    • 93

    Mostly Sunny

    • 58
    • 80

    Mostly Sunny

    • 61
    • 81

    Mostly Sunny

    • 64
    • 83

    Slight Chance Thunderstorms

    • 66
    • 83

    Mostly Sunny

Today 19 Jul Big Stone

Partly sunny. Hot with Highs in the lower 90s. South Winds 10 to 15 Mph.

Tonight 19 Jul Big Stone

Mostly clear in the Evening, then becoming partly cloudy. A 40 percent chance of Thunderstorms. Humid with Lows in the lower 70s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lannon Lake Temperature Statistics

July Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 9 July, 2026

    59 °F

  • Average July

    75.8 °F

  • Highest 14 July, 2026

    91.4 °F

Climate (2021–2026)

Wheaton Municipal Airport (16.8 miles)

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

  • Average Low 2021–2026

    34.8 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    54.4 °F
Get WillyWeather+ to remove ads