Castle Rock Weather Forecast

    • 77
    • 97

    Chance Thunderstorms

    • 77
    • 94

    Thunderstorms Likely

    • 76
    • 91

    Thunderstorms Likely

    • 75
    • 93

    Chance Thunderstorms

    • 76
    • 96

    Slight Chance Thunderstorms

    • 77
    • 95

    Chance Thunderstorms

Today 20 Aug Fort Bend

Sunny with a chance of Showers and Thunderstorms. Hot. Near steady temperature in the mid 90s. Northeast Winds around 5 Mph. Chance of rain 50 percent.

Tonight 20 Aug Fort Bend

Partly cloudy with a chance of Showers and Thunderstorms in the Evening, then mostly clear with a chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the mid 70s. East Winds around 5 Mph, becoming west after midnight. Chance of rain 50 percent.

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Castle Rock Temperature Statistics

August Temperature

Houston Executive Airport (9.3 miles)

  • Lowest 12 August, 2025

    75.2 °F

  • Average August

    85.4 °F

  • Highest 14 August, 2025

    98.6 °F

Climate (2020–Present)

Houston Executive Airport (9.3 miles)

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  • Average Low 2020–2025

    60.8 °F

  • Average 2020–2025

    70.5 °F

  • Average High 2020–2025

    81.2 °F
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