Glen Carbon Weather Forecast

    • 53
    • 81

    Decreasing Clouds

    • 64
    • 87

    Mostly Sunny

    • 70
    • 94

    Sunny

    • 65
    • 92

    Rain Showers Likely

    • 62
    • 81

    Rain Showers Likely

    • 56
    • 79

    Chance Rain Showers

Today 10 Oct Madison

Mostly sunny. Highs in the lower 80s. Southeast Winds 5 to 10 Mph.

Tonight 10 Oct Madison

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the mid 50s. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Glen Carbon Temperature Statistics

October Temperature

St. Louis Regional Airport (9.9 miles)

  • Lowest 6 October, 2026

    43.2 °F

  • Average October

    61.1 °F

  • Highest 1 October, 2026

    89.6 °F

Climate (2021–2026)

St. Louis Regional Airport (9.9 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    54.5 °F

  • Average High 2021–2026

    66.7 °F
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