Castac Lake Weather Forecast

    • 54
    • 88

    Mostly Sunny

    • 52
    • 72

    Mostly Sunny

    • 54
    • 73

    Sunny

    • 55
    • 78

    Sunny

    • 51
    • 74

    Mostly Sunny

    • 51
    • 73

    Mostly Sunny

Today 12 May Grapevine

Sunny. Highs 85 to 95. East Winds up to 10 Mph with Gusts to around 25 Mph.

Tonight 12 May Grapevine

Mostly clear. Lows in the mid 50s. Southwest 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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