Ralph Jacobs Airport Weather Forecast

    • 77
    • 98

    Isolated Thunderstorms

    • 76
    • 99

    Hot

    • 76
    • 99

    Hot

    • 73
    • 100

    Slight Chance Thunderstorms

    • 70
    • 91

    Slight Chance Thunderstorms

    • 71
    • 90

    Partly Sunny

Today 13 Aug Monroe

Mostly sunny with isolated Showers and Thunderstorms. Hot with Highs in the upper 90s. Southwest Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 112 in the afternoon.

Tonight 13 Aug Monroe

Partly cloudy with isolated Showers and Thunderstorms in the Evening, then mostly clear after midnight. Lows in the upper 70s. South Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 109 early in the evening.

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Ralph Jacobs Airport Temperature Statistics

August Temperature

St. Louis Downtown Airport (15.5 miles)

  • Lowest 3 August, 2026

    63.6 °F

  • Average August

    77.6 °F

  • Highest 9 August, 2026

    92.6 °F

Climate (2021–2026)

St. Louis Downtown Airport (15.5 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    69.3 °F
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