Lambert - St. Louis International Airport Weather Forecast

    • 70
    • 86

    Increasing Clouds

    • 66
    • 85

    Mostly Sunny

    • 64
    • 81

    Partly Sunny

    • 66
    • 80

    Chance Thunderstorms

    • 69
    • 85

    Mostly Cloudy

    • 68
    • 86

    Partly Sunny

Today 21 Aug St. Louis

Sunny. Highs in the mid 80s. East Winds around 5 Mph, becoming west around 5 Mph this afternoon.

Tonight 21 Aug St. Louis

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 60s. Southwest Winds around 5 Mph.

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Lambert - St. Louis International Airport Temperature Statistics

August Temperature

St. Louis Lambert International Airport (0 miles)

  • Lowest 3 August, 2026

    66.9 °F

  • Average August

    81.3 °F

  • Highest 11 August, 2026

    96.7 °F

Climate (2021–2026)

St. Louis Lambert International Airport (0 miles)

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  • Average Low 2021–2026

    50.7 °F

  • Average 2021–2026

    60.2 °F

  • Average High 2021–2026

    69.7 °F
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