Rattlesnake Lake Weather Forecast

    • 70
    • 88

    Decreasing Clouds

    • 67
    • 90

    Partly Sunny

    • 60
    • 81

    Partly Sunny

    • 63
    • 84

    Partly Sunny

    • 65
    • 87

    Partly Sunny

    • 68
    • 87

    Mostly Cloudy

Today 9 May Hays

Mostly cloudy with a slight chance of Showers and Thunderstorms in the Morning, then partly cloudy in the afternoon. Highs in the mid 80s. East Winds around 5 Mph, becoming southeast around 5 Mph in the afternoon. Chance of rain 20 percent.

Tonight 9 May Hays

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 60s. South Winds around 5 Mph.

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Rattlesnake Lake Temperature Statistics

May Temperature

San Marcos, San Marcos Municipal Airport (16.2 miles)

  • Lowest 2 May, 2026

    50 °F

  • Average May

    68.8 °F

  • Highest 5 May, 2026

    84 °F

Climate (2021–Present)

San Marcos, San Marcos Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    60 °F

  • Average 2021–2026

    70.7 °F

  • Average High 2021–2026

    82.3 °F
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