Ethlyn Weather Forecast

    • 71
    • 90

    Mostly Sunny

    • 75
    • 93

    Mostly Sunny

    • 76
    • 94

    Mostly Sunny

    • 74
    • 93

    Chance Thunderstorms

    • 71
    • 91

    Chance Thunderstorms

    • 68
    • 86

    Rain Showers Likely

Today 8 Aug Lincoln

Sunny. Highs around 90. Northwest Winds around 5 Mph, becoming south this afternoon.

Tonight 8 Aug Lincoln

Mostly clear. Lows in the lower 70s. Southeast Winds around 5 Mph.

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Ethlyn Temperature Statistics

August Temperature

St. Charles, St. Charles County Smartt Airport (21.1 miles)

  • Lowest 3 August, 2026

    63.6 °F

  • Average August

    74.6 °F

  • Highest 4 August, 2026

    88.6 °F

Climate (2021–2026)

St. Charles, St. Charles County Smartt Airport (21.1 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    69 °F
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