Castac Lake Weather Forecast

    • 46
    • 64

    Partly Sunny

    • 47
    • 65

    Mostly Cloudy

    • 48
    • 56

    Rain Showers

    • 45
    • 53

    Rain

    • 44
    • 52

    Rain

    • 42
    • 51

    Rain

Today 21 Dec Grapevine

Mostly sunny. Highs in the lower 60s. South Winds up to 5 Mph shifting to the north in the afternoon.

Tonight 21 Dec Grapevine

Mostly cloudy. Lows in the upper 40s. Southwest Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Castac Lake Temperature Statistics

December Temperature

Sandberg (8.7 miles)

  • Lowest 4 December, 2025

    37 °F

  • Average December

    53.5 °F

  • Highest 11 December, 2025

    66.9 °F

Climate (2020–Present)

Sandberg (8.7 miles)

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  • Average Low 2020–2025

    51.5 °F

  • Average 2020–2025

    59.3 °F

  • Average High 2020–2025

    68 °F
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