Alto Pass Weather Forecast

    • 55
    • 78

    Chance Thunderstorms

    • 60
    • 78

    Slight Chance Thunderstorms

    • 66
    • 80

    Chance Rain Showers

    • 68
    • 81

    Chance Thunderstorms

    • 68
    • 85

    Chance Rain Showers

    • 61
    • 84

    Chance Rain Showers

Today 10 Apr Union

Mostly sunny. A chance of Showers and Thunderstorms this afternoon. Highs in the upper 70s. Southwest Winds 5 to 10 Mph, becoming west this afternoon. Chance of rain 50 percent.

Tonight 10 Apr Union

Mostly cloudy. A chance of Showers and Thunderstorms, mainly in the evening. Lows in the mid 50s. Northeast Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alto Pass Temperature Statistics

April Temperature

Southern Illinois Airport (14.9 miles)

  • Lowest 6 April, 2026

    36.6 °F

  • Average April

    61.5 °F

  • Highest 3 April, 2026

    81.6 °F

Climate (2021–Present)

Southern Illinois Airport (14.9 miles)

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  • Average Low 2021–2026

    48 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    69.1 °F
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