Lannon Lake Weather Forecast

    • 73
    • 96

    Sunny

    • 73
    • 96

    Mostly Sunny

    • 69
    • 97

    Hot

    • 71
    • 94

    Mostly Sunny

    • 72
    • 93

    Mostly Sunny

    • 69
    • 93

    Mostly Sunny

Today 12 Jul Big Stone

Sunny, hot with Highs in the mid 90s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Heat index Values up to 102.

Tonight 12 Jul Big Stone

Clear with Lows in the lower 70s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Heat index Values up to 101 early in the evening.

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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

    72.9 °F

  • Highest 4 July, 2026

    87.8 °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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