Castac Lake Weather Forecast

    • 53
    • 74

    Sunny

    • 58
    • 84

    Sunny

    • 61
    • 87

    Sunny

    • 62
    • 88

    Mostly Sunny

    • 63
    • 87

    Sunny

    • 62
    • 86

    Sunny

Today 29 Sep Grapevine

Warmer, sunny. Highs 69 to 79. Northwest Winds 5 to 15 Mph.

Tonight 29 Sep Grapevine

Clear. Lows in the mid 50s. West Winds up to 10 Mph. Gusts up to 25 Mph in the evening.

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Castac Lake Temperature Statistics

September Temperature

Sandberg (8.7 miles)

  • Lowest 21 September, 2026

    46.7 °F

  • Average September

    68.5 °F

  • Highest 9 September, 2026

    92.6 °F

Climate (2021–2026)

Sandberg (8.7 miles)

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  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    59.2 °F

  • Average High 2021–2026

    67.9 °F
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