South Flat Top Lake Weather Forecast

    • 73
    • 95

    Chance Thunderstorms

    • 71
    • 93

    Chance Thunderstorms

    • 70
    • 94

    Slight Chance Thunderstorms

    • 69
    • 93

    Partly Sunny

    • 68
    • 93

    Partly Sunny

    • 67
    • 91

    Mostly Cloudy

Today 20 Sep Bosque

Partly sunny with a 20 percent chance of Showers and Thunderstorms. Highs in the mid 90s. South Winds 5 to 10 Mph.

Tonight 20 Sep Bosque

Mostly cloudy in the Evening, then becoming partly cloudy. A 20 percent chance of Showers and Thunderstorms. Lows in the lower 70s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Flat Top Lake Temperature Statistics

September Temperature

Stephenville, Clark Field Municipal Airport (24.2 miles)

  • Lowest 18 September, 2026

    71.6 °F

  • Average September

    87.3 °F

  • Highest 12 September, 2026

    103.6 °F

Climate (2021–2026)

Stephenville, Clark Field Municipal Airport (24.2 miles)

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  • Average Low 2021–2026

    56.2 °F

  • Average 2021–2026

    67.9 °F

  • Average High 2021–2026

    80.1 °F
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