Lannon Lake Weather Forecast

    • 64
    • 92

    Mostly Sunny

    • 66
    • 87

    Becoming Sunny

    • 72
    • 91

    Chance Rain Showers

    • 63
    • 92

    Slight Chance Thunderstorms

    • 57
    • 79

    Mostly Sunny

    • 60
    • 78

    Mostly Sunny

    • 63
    • 84

    Slight Chance Thunderstorms

Today 17 Jul Big Stone

Mostly sunny. Hot. Near steady temperature in the lower 90s. Northwest Winds 5 to 10 Mph. Heat index Values up to 104.

Tonight 17 Jul Big Stone

Mostly clear. Patchy smoke. Lows in the mid 60s. North Winds 5 to 10 Mph.

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  • Temperature Real-Time

Lannon Lake Temperature Statistics

July Temperature

Wheaton Municipal Airport (16.8 miles)

  • Lowest 9 July, 2026

    59 °F

  • Average July

    75.4 °F

  • Highest 14 July, 2026

    91.4 °F

Climate (2021–2026)

Wheaton Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    34.7 °F

  • Average 2021–2026

    44.6 °F

  • Average High 2021–2026

    54.4 °F
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