Maplewood Weather Forecast

    • 75
    • 98

    Chance Thunderstorms

    • 76
    • 96

    Slight Chance Thunderstorms

    • 74
    • 97

    Hot

    • 70
    • 93

    Slight Chance Thunderstorms

    • 66
    • 87

    Chance Rain Showers

    • 64
    • 82

    Slight Chance Rain Showers

Today 17 Sep St. Louis

Sunny. A slight chance of Showers and Thunderstorms this afternoon. Hot with Highs in the upper 90s. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 108 this afternoon.

Tonight 17 Sep St. Louis

Mostly clear. A slight chance of Showers and Thunderstorms in the evening. Humid with Lows in the lower 70s. Southwest Winds around 5 Mph, becoming north after midnight. Chance of rain 20 percent. Heat index Values up to 103 early in the evening.

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Maplewood Temperature Statistics

September Temperature

St. Louis Lambert International Airport (9.9 miles)

  • Lowest 14 September, 2026

    63 °F

  • Average September

    83.1 °F

  • Highest 5 September, 2026

    101.6 °F

Climate (2021–2026)

St. Louis Lambert International Airport (9.9 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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