Alto Pass Weather Forecast

    • 59
    • 70

    Rain Showers Likely

    • 61
    • 76

    Rain Showers

    • 43
    • 70

    Rain Showers

    • 46
    • 62

    Mostly Sunny

    • 60
    • 72

    Rain Showers Likely

    • 56
    • 74

    Rain Showers

Today 5 Mar Union

Patchy fog this morning. A chance of Thunderstorms. Showers, mainly this morning. Highs in the lower 70s. South Winds 5 to 10 Mph. Chance of rain 90 percent.

Tonight 5 Mar Union

Mostly cloudy. A chance of Showers and Thunderstorms in the evening. Patchy fog after midnight. Lows in the upper 50s. South Winds 5 to 10 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alto Pass Temperature Statistics

March Temperature

Southern Illinois Airport (14.9 miles)

  • Lowest 1 March, 2026

    30.2 °F

  • Average March

    40.3 °F

  • Highest 1 March, 2026

    48 °F

Climate (2021–Present)

Southern Illinois Airport (14.9 miles)

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  • Average Low 2021–2026

    47.9 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    69 °F
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