Arrowhead Lake Weather Forecast

    • 78
    • 103

    Slight Chance Thunderstorms

    • 78
    • 102

    Hot

    • 77
    • 101

    Hot

    • 77
    • 100

    Hot

    • 78
    • 101

    Hot

    • 77
    • 101

    Hot

Today 22 Aug Montgomery

Sunny. A slight chance of Showers and Thunderstorms this afternoon. Hot with Highs around 102. Southwest Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 109.

Tonight 22 Aug Montgomery

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows in the upper 70s. South Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 107 early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Arrowhead Lake Temperature Statistics

August Temperature

Conroe, Montgomery County Airport (8.1 miles)

  • Lowest 3 August, 2026

    69.7 °F

  • Average August

    86.4 °F

  • Highest 15 August, 2026

    101.6 °F

Climate (2021–2026)

Conroe, Montgomery County Airport (8.1 miles)

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  • Average Low 2021–2026

    58.8 °F

  • Average 2021–2026

    70 °F

  • Average High 2021–2026

    81.6 °F
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