Granite City Weather Forecast

    • 77
    • 95

    Slight Chance Thunderstorms

    • 68
    • 97

    Rain Showers

    • 66
    • 86

    Slight Chance Thunderstorms

    • 69
    • 88

    Chance Thunderstorms

    • 65
    • 84

    Chance Thunderstorms

    • 61
    • 81

    Slight Chance Thunderstorms

Today 10 Jun Madison

Sunny. Highs in the lower 90s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Heat index Values up to 101.

Tonight 10 Jun Madison

Mostly clear. Lows in the mid 70s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Granite City Temperature Statistics

June Temperature

St. Louis Downtown Airport (9.3 miles)

  • Lowest 3 June, 2026

    52.6 °F

  • Average June

    75 °F

  • Highest 7 June, 2026

    88 °F

Climate (2021–Present)

St. Louis Downtown Airport (9.3 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    69.3 °F
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