Lannon Lake Weather Forecast

    • 58
    • 78

    Mostly Sunny

    • 64
    • 85

    Partly Sunny

    • 71
    • 88

    Mostly Sunny

    • 71
    • 97

    Slight Chance Thunderstorms

    • 69
    • 95

    Mostly Sunny

    • 67
    • 89

    Mostly Sunny

Today 22 Jul Big Stone

Mostly sunny. Highs in the upper 70s. Northeast Winds around 5 Mph.

Tonight 22 Jul Big Stone

Mostly clear. Lows in the upper 50s. East Winds around 5 Mph, becoming south around 5 Mph after midnight.

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

    75.7 °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