Alto Pass Weather Forecast

    • 58
    • 80

    Mostly Sunny

    • 56
    • 78

    Mostly Sunny

    • 62
    • 79

    Partly Sunny

    • 53
    • 75

    Rain Showers Likely

    • 46
    • 67

    Slight Chance Rain Showers

    • 52
    • 71

    Mostly Sunny

Today 15 Oct Union

Patchy fog in the morning. Sunny. Highs in the lower 80s. Northeast Winds around 5 Mph.

Tonight 15 Oct Union

Clear. Lows in the upper 50s. East Winds around 5 Mph in the Evening, becoming light and variable.

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Alto Pass Temperature Statistics

October Temperature

Southern Illinois Airport (14.9 miles)

  • Lowest 10 October, 2025

    41 °F

  • Average October

    66.3 °F

  • Highest 1 October, 2025

    87.8 °F

Climate (2020–Present)

Southern Illinois Airport (14.9 miles)

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  • Average Low 2020–2025

    47.9 °F

  • Average 2020–2025

    58.2 °F

  • Average High 2020–2025

    68.8 °F
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