Vandalia Weather Forecast

    • 59
    • 88

    Becoming Sunny

    • 59
    • 89

    Mostly Sunny

    • 61
    • 90

    Mostly Sunny

    • 63
    • 90

    Partly Sunny

    • 64
    • 87

    Slight Chance Thunderstorms

    • 63
    • 84

    Chance Rain Showers

    • 61
    • 83

    Chance Rain Showers

Today 17 Sep Montgomery

Mostly sunny. Highs in the upper 80s. Northwest Winds around 5 Mph.

Tonight 17 Sep Montgomery

Mostly clear. Lows in the upper 50s. North Winds around 5 Mph until early Morning, becoming light and variable.

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Vandalia Temperature Statistics

September Temperature

Dayton, Cox Dayton International Airport (1.2 miles)

  • Lowest 8 September, 2025

    44.1 °F

  • Average September

    66.4 °F

  • Highest 14 September, 2025

    86 °F

Climate (2020–Present)

Dayton, Cox Dayton International Airport (1.2 miles)

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  • Average Low 2020–2025

    46.3 °F

  • Average 2020–2025

    55.4 °F

  • Average High 2020–2025

    64.7 °F
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