Glen Carbon Weather Forecast

    • 61
    • 73

    Slight Chance Rain Showers

    • 67
    • 81

    Rain Showers Likely

    • 69
    • 84

    Chance Rain Showers

    • 70
    • 87

    Rain Showers Likely

    • 65
    • 84

    Rain Showers Likely

    • 62
    • 79

    Chance Thunderstorms

Today 11 Apr Madison

Partly sunny. A slight chance of Showers this afternoon. Highs in the lower 70s. East Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 11 Apr Madison

Partly cloudy. A slight chance of Showers in the evening. Not as cool with Lows around 60. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Glen Carbon Temperature Statistics

April Temperature

St. Louis Regional Airport (9.9 miles)

  • Lowest 5 April, 2026

    38.8 °F

  • Average April

    57 °F

  • Highest 3 April, 2026

    82.4 °F

Climate (2021–Present)

St. Louis Regional Airport (9.9 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    54.3 °F

  • Average High 2021–2026

    66.6 °F
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