Lannon Lake Weather Forecast

    • 65
    • 98

    Severe Tstms

    • 64
    • 88

    Slight Chance Rain Showers

    • 65
    • 87

    Chance Rain Showers

    • 68
    • 92

    Rain Showers Likely

    • 69
    • 91

    Rain Showers Likely

    • 66
    • 88

    Rain Showers Likely

    • 63
    • 84

    Slight Chance Thunderstorms

Today 29 Jun Big Stone

Partly sunny with a 20 percent chance of Thunderstorms. Warmer. Near steady temperature in the mid 80s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Heat index Values up to 101.

Tonight 29 Jun Big Stone

Partly cloudy. A slight chance of Thunderstorms this evening. Some Thunderstorms may be severe. Lows in the mid 60s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent. Heat index Values up to 105 early this evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lannon Lake Temperature Statistics

June Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 14 June, 2026

    48.2 °F

  • Average June

    67.7 °F

  • Highest 7 June, 2026

    89.6 °F

Climate (2021–2026)

Wheaton Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    34.7 °F

  • Average 2021–2026

    44.5 °F

  • Average High 2021–2026

    54.4 °F
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