Cedar Park Weather Forecast

    • 70
    • 93

    Decreasing Clouds

    • 70
    • 92

    Slight Chance Thunderstorms

    • 70
    • 92

    Mostly Sunny

    • 70
    • 92

    Mostly Sunny

    • 71
    • 93

    Mostly Sunny

    • 68
    • 92

    Chance Rain Showers

Today 17 Sep Williamson

Mostly sunny this Morning, then partly cloudy with a slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. Southwest Winds around 5 Mph, becoming southeast around 5 Mph this afternoon.

Tonight 17 Sep Williamson

Partly cloudy in the Evening, then clearing. Lows around 70. Southeast Winds around 5 Mph, becoming southwest around 5 Mph after midnight.

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Cedar Park Temperature Statistics

September Temperature

Lago Vista TX, Rusty Allen Airport (8.1 miles)

  • Lowest 9 September, 2025

    63.9 °F

  • Average September

    79.8 °F

  • Highest 4 September, 2025

    99.5 °F

Climate (2020–Present)

Lago Vista TX, Rusty Allen Airport (8.1 miles)

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  • Average Low 2020–2025

    59.3 °F

  • Average 2020–2025

    68.6 °F

  • Average High 2020–2025

    79.6 °F
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