Rattlesnake Lake Weather Forecast

    • 40
    • 54

    Mostly Cloudy

    • 52
    • 61

    Cloudy

    • 59
    • 70

    Mostly Cloudy

    • 45
    • 80

    Mostly Sunny

    • 53
    • 70

    Partly Sunny

    • 57
    • 78

    Partly Sunny

Today 15 Dec Hays

Mostly cloudy this Morning, then becoming partly cloudy. Highs in the mid 50s. Northeast Winds around 5 Mph, becoming southeast this afternoon.

Tonight 15 Dec Hays

Mostly cloudy. Not as cool with Lows around 40. South Winds around 5 Mph.

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Rattlesnake Lake Temperature Statistics

December Temperature

San Marcos, San Marcos Municipal Airport (16.2 miles)

  • Lowest 9 December, 2025

    28 °F

  • Average December

    53 °F

  • Highest 13 December, 2025

    80.1 °F

Climate (2020–Present)

San Marcos, San Marcos Municipal Airport (16.2 miles)

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  • Average Low 2020–2025

    59.4 °F

  • Average 2020–2025

    70.2 °F

  • Average High 2020–2025

    81.8 °F
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