Grand Lake Weather Forecast

    • 73
    • 95

    Slight Chance Thunderstorms

    • 71
    • 95

    Mostly Cloudy

    • 72
    • 95

    Mostly Cloudy

    • 73
    • 96

    Hot

    • 74
    • 98

    Slight Chance Thunderstorms

    • 73
    • 97

    Chance Rain Showers

Today 23 Sep Stephens

Mostly cloudy with a 30 percent chance of Showers and Thunderstorms. Highs in the mid 90s. Southeast Winds around 5 Mph.

Tonight 23 Sep Stephens

Mostly cloudy. A 20 percent chance of Showers and Thunderstorms in the evening. Lows in the lower 70s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand Lake Temperature Statistics

September Temperature

Stephens County Airport (3.1 miles)

  • Lowest 21 September, 2026

    71.1 °F

  • Average September

    88.4 °F

  • Highest 3 September, 2026

    105.6 °F

Climate (2021–2026)

Stephens County Airport (3.1 miles)

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  • Average Low 2021–2026

    57.1 °F

  • Average 2021–2026

    69 °F

  • Average High 2021–2026

    81.4 °F
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