Rattlesnake Lake Weather Forecast

    • 74
    • 93

    Decreasing Clouds

    • 73
    • 94

    Partly Sunny

    • 71
    • 95

    Sunny

    • 72
    • 96

    Mostly Sunny

    • 74
    • 96

    Mostly Sunny

    • 74
    • 96

    Mostly Sunny

Today 18 Jul Hays

Mostly cloudy this Morning, then becoming partly cloudy. Highs in the lower 90s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 18 Jul Hays

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 70s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rattlesnake Lake Temperature Statistics

July Temperature

San Marcos, San Marcos Municipal Airport (16.2 miles)

  • Lowest 10 July, 2026

    70 °F

  • Average July

    82.9 °F

  • Highest 8 July, 2026

    98.1 °F

Climate (2021–2026)

San Marcos, San Marcos Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    60 °F

  • Average 2021–2026

    70.8 °F

  • Average High 2021–2026

    82.4 °F
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