Diversion Lake Weather Forecast

    • 51
    • 77

    Increasing Clouds

    • 62
    • 75

    Mostly Cloudy

    • 61
    • 80

    Mostly Cloudy

    • 61
    • 79

    Mostly Cloudy

    • 59
    • 78

    Mostly Cloudy

    • 58
    • 81

    Partly Sunny

Today 21 Dec Medina

Sunny. Highs in the upper 70s. Northeast Winds 5 to 10 Mph.

Tonight 21 Dec Medina

Clear in the Evening, then becoming partly cloudy. Lows around 50. Northeast Winds around 5 Mph.

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Diversion Lake Temperature Statistics

December Temperature

Castroville Municipal Airport (13 miles)

  • Lowest 9 December, 2025

    32 °F

  • Average December

    54.4 °F

  • Highest 7 December, 2025

    82.4 °F

Climate (2020–Present)

Castroville Municipal Airport (13 miles)

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  • Average Low 2020–2025

    61.3 °F

  • Average 2020–2025

    72.1 °F

  • Average High 2020–2025

    83.9 °F
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