Valmeyer Weather Forecast

    • 75
    • 89

    Isolated Thunderstorms

    • 77
    • 94

    Isolated Thunderstorms

    • 78
    • 97

    Mostly Sunny

    • 76
    • 97

    Hot

    • 76
    • 94

    Chance Thunderstorms

    • 76
    • 95

    Chance Thunderstorms

    • 76
    • 95

    Slight Chance Thunderstorms

Today 21 Jul Monroe

Mostly sunny. Highs in the upper 80s. South Winds around 5 Mph. Heat index Values up to 101.

Tonight 21 Jul Monroe

Partly cloudy. Isolated Showers and Thunderstorms after midnight. Humid with Lows in the mid 70s. Southeast Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 100 early in the evening.

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Valmeyer Temperature Statistics

July Temperature

St. Louis Downtown Airport (19.9 miles)

  • Lowest 2 July, 2025

    63.6 °F

  • Average July

    81.4 °F

  • Highest 11 July, 2025

    97.6 °F

Climate (2020–Present)

St. Louis Downtown Airport (19.9 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    57.7 °F

  • Average High 2020–2025

    68.3 °F
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