Brighton Weather Forecast

    • 74
    • 92

    Thunderstorms Likely

    • 74
    • 87

    Chance Thunderstorms

    • 76
    • 92

    Slight Chance Thunderstorms

    • 77
    • 96

    Mostly Sunny

    • 75
    • 96

    Mostly Sunny

    • 75
    • 94

    Slight Chance Thunderstorms

Today 20 Jul Macoupin

Cloudy early this Morning, then becoming partly sunny. A chance of Showers. A chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall this afternoon. Highs in the lower 90s. Southwest Winds around 5 Mph. Chance of rain 50 percent. Heat index Values up to 102.

Tonight 20 Jul Macoupin

Showers and Thunderstorms likely. Some Thunderstorms may produce heavy rainfall. Humid with Lows in the lower 70s. Northeast Winds around 5 Mph. Chance of rain 70 percent. Heat index Values up to 102 early in the evening.

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Brighton Temperature Statistics

July Temperature

St. Louis Regional Airport (11.8 miles)

  • Lowest 2 July, 2025

    63.9 °F

  • Average July

    76 °F

  • Highest 4 July, 2025

    91.4 °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

    65.9 °F
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