Brighton Weather Forecast

    • 69
    • 97

    Slight Chance Thunderstorms

    • 67
    • 93

    Partly Sunny

    • 66
    • 92

    Partly Sunny

    • 66
    • 92

    Slight Chance Thunderstorms

    • 63
    • 87

    Chance Rain Showers

    • 60
    • 85

    Chance Rain Showers

Today 14 Sep Macoupin

Mostly sunny. A slight chance of Showers and Thunderstorms in the afternoon. Hot with Highs in the upper 90s. Northwest Winds around 5 Mph. Chance of rain 20 percent.

Tonight 14 Sep Macoupin

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows in the upper 60s. Northeast Winds around 5 Mph. Chance of rain 20 percent.

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Brighton Temperature Statistics

September Temperature

St. Louis Regional Airport (11.8 miles)

  • Lowest 8 September, 2025

    43.5 °F

  • Average September

    61.8 °F

  • Highest 11 September, 2025

    87.8 °F

Climate (2020–Present)

St. Louis Regional Airport (11.8 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    53.8 °F

  • Average High 2020–2025

    66 °F
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