Grand Lake Weather Forecast

    • 44
    • 63

    Mostly Sunny

    • 51
    • 76

    Mostly Sunny

    • 57
    • 82

    Sunny

    • 60
    • 87

    Sunny

    • 63
    • 91

    Mostly Sunny

    • 63
    • 90

    Sunny

    • 62
    • 88

    Mostly Sunny

Today 17 Mar Montgomery

Sunny. Highs in the lower 60s. Southeast Winds around 5 Mph.

Tonight 17 Mar Montgomery

Mostly clear. Not as cool with Lows in the mid 40s. South Winds around 5 Mph.

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Grand Lake Temperature Statistics

March Temperature

Conroe, Montgomery County Airport (6.8 miles)

  • Lowest 13 March, 2026

    39 °F

  • Average March

    70.2 °F

  • Highest 3 March, 2026

    85.6 °F

Climate (2021–Present)

Conroe, Montgomery County Airport (6.8 miles)

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  • Average Low 2021–2026

    58.6 °F

  • Average 2021–2026

    69.6 °F

  • Average High 2021–2026

    81.3 °F
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