Gilmore Weather Forecast

    • 72
    • 97

    Slight Chance Thunderstorms

    • 74
    • 94

    Mostly Sunny

    • 71
    • 95

    Partly Sunny

    • 67
    • 90

    Chance Rain Showers

    • 63
    • 84

    Chance Rain Showers

    • 61
    • 80

    Slight Chance Rain Showers

Today 17 Sep St. Charles

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. Charles

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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Gilmore Temperature Statistics

September Temperature

St. Louis, Spirit Of St. Louis Airport (13 miles)

  • Lowest 8 September, 2026

    59.6 °F

  • Average September

    80.9 °F

  • Highest 5 September, 2026

    102.7 °F

Climate (2021–2026)

St. Louis, Spirit Of St. Louis Airport (13 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    57.5 °F

  • Average High 2021–2026

    69 °F
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