Rattlesnake Lake Weather Forecast

    • 68
    • 84

    Chance Thunderstorms

    • 68
    • 84

    Chance Thunderstorms

    • 67
    • 86

    Partly Sunny

    • 70
    • 86

    Rain Showers Likely

    • 70
    • 83

    Rain Showers Likely

    • 73
    • 87

    Chance Thunderstorms

Today 23 May Hays

Mostly cloudy. A slight chance of Showers and Thunderstorms in the Morning, then Showers and Thunderstorms likely in the afternoon. Some Thunderstorms may produce heavy rainfall in the morning. Locally heavy rainfall possible in the afternoon. Highs in the lower 80s. Temperature falling into the upper 70s in the afternoon. Southeast Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 23 May Hays

Partly cloudy late this Evening, then becoming mostly cloudy. Showers and Thunderstorms likely late this Evening, then a chance of Showers and Thunderstorms. Some Thunderstorms may produce heavy rainfall. Near steady temperature in the lower 70s. Southeast Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rattlesnake Lake Temperature Statistics

May Temperature

San Marcos, San Marcos Municipal Airport (16.2 miles)

  • Lowest 2 May, 2026

    50 °F
  • Average May

    73.7 °F
  • Highest 19 May, 2026

    91.9 °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

    82.4 °F
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