Castac Lake Weather Forecast

    • 54
    • 88

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 54
    • 75

    Sunny

    • 55
    • 78

    Sunny

    • 51
    • 74

    Mostly Sunny

    • 51
    • 73

    Mostly Sunny

Today 12 May Grapevine

Sunny. Highs 84 to 94. East Winds up to 15 Mph.

Tonight 12 May Grapevine

Mostly clear. Lows in the mid 50s. South Winds 5 to 10 Mph shifting to the west after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Castac Lake Temperature Statistics

May Temperature

Sandberg (8.7 miles)

  • Lowest 4 May, 2026

    38.6 °F

  • Average May

    58.7 °F

  • Highest 7 May, 2026

    79.6 °F

Climate (2021–Present)

Sandberg (8.7 miles)

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  • Average Low 2021–2026

    51.5 °F

  • Average 2021–2026

    59.4 °F

  • Average High 2021–2026

    68.1 °F
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