Grant Lake Weather Forecast

    • 70
    • 93

    Mostly Sunny

    • 68
    • 93

    Slight Chance Thunderstorms

    • 68
    • 93

    Partly Sunny

    • 68
    • 92

    Slight Chance Thunderstorms

    • 70
    • 92

    Chance Thunderstorms

    • 70
    • 91

    Chance Thunderstorms

Today 16 Sep Montgomery

Sunny. A slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. North Winds around 5 Mph, becoming northeast around 5 Mph this afternoon. Chance of rain 20 percent.

Tonight 16 Sep Montgomery

Mostly clear. A slight chance of Showers in the evening. Lows around 70. Southeast Winds around 5 Mph, becoming southwest after midnight. Chance of rain 20 percent.

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Grant Lake Temperature Statistics

September Temperature

Conroe, Montgomery County Airport (10.6 miles)

  • Lowest 9 September, 2025

    59 °F

  • Average September

    78.4 °F

  • Highest 4 September, 2025

    95 °F

Climate (2020–Present)

Conroe, Montgomery County Airport (10.6 miles)

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  • Average Low 2020–2025

    58.2 °F

  • Average 2020–2025

    69.1 °F

  • Average High 2020–2025

    80.7 °F
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