Granite City Weather Forecast

    • 50
    • 77

    Partly Sunny

    • 53
    • 80

    Mostly Cloudy

    • 52
    • 78

    Mostly Cloudy

    • 53
    • 77

    Mostly Cloudy

    • 55
    • 81

    Mostly Sunny

    • 53
    • 79

    Partly Sunny

Today 24 Oct Madison

Sunny. Highs in the mid 70s. Southeast Winds around 5 Mph.

Tonight 24 Oct Madison

Partly cloudy in the Evening, then becoming mostly clear. Lows in the upper 40s. Southeast Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Granite City Temperature Statistics

October Temperature

St. Louis Downtown Airport (9.3 miles)

  • Lowest 18 October, 2026

    35.7 °F

  • Average October

    64.6 °F

  • Highest 13 October, 2026

    94.6 °F

Climate (2021–2026)

St. Louis Downtown Airport (9.3 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    69.5 °F
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