Heritage Weather Forecast

    • 59
    • 72

    Increasing Clouds

    • 50
    • 74

    Mostly Cloudy

    • 38
    • 58

    Mostly Cloudy

    • 46
    • 58

    Mostly Cloudy

    • 57
    • 64

    Mostly Cloudy

    • 60
    • 74

    Partly Sunny

Today 12 Dec Hays

Mostly cloudy this Morning, then becoming partly cloudy. Areas of dense fog this morning. Highs in the lower 70s. Southwest Winds around 5 Mph.

Tonight 12 Dec Hays

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 50s. Northeast Winds around 5 Mph.

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Heritage Temperature Statistics

December Temperature

San Marcos, San Marcos Municipal Airport (5 miles)

  • Lowest 9 December, 2025

    28 °F

  • Average December

    49.8 °F

  • Highest 6 December, 2025

    78.1 °F

Climate (2020–Present)

San Marcos, San Marcos Municipal Airport (5 miles)

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  • Average Low 2020–2025

    59.4 °F

  • Average 2020–2025

    70.1 °F

  • Average High 2020–2025

    81.8 °F
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