Grant Lake Weather Forecast

    • 68
    • 82

    Chance Thunderstorms

    • 66
    • 87

    Mostly Sunny

    • 65
    • 88

    Mostly Sunny

    • 66
    • 89

    Mostly Sunny

    • 65
    • 89

    Partly Sunny

    • 65
    • 86

    Slight Chance Thunderstorms

Today 4 Oct Montgomery

Partly sunny with a chance of Showers and Thunderstorms this Morning, then mostly cloudy with a slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 80s. North Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

Tonight 4 Oct Montgomery

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the upper 60s. North Winds 5 to 10 Mph with Gusts up to 20 Mph.

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Grant Lake Temperature Statistics

October Temperature

Conroe, Montgomery County Airport (10.6 miles)

  • Lowest 2 October, 2026

    73 °F

  • Average October

    79.9 °F

  • Highest 1 October, 2026

    91 °F

Climate (2021–2026)

Conroe, Montgomery County Airport (10.6 miles)

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  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    70.2 °F

  • Average High 2021–2026

    81.8 °F
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