Rio Vista Weather Forecast

    • 75
    • 97

    Hot

    • 74
    • 96

    Slight Chance Thunderstorms

    • 74
    • 95

    Mostly Sunny

    • 74
    • 96

    Mostly Sunny

    • 75
    • 96

    Mostly Sunny

    • 75
    • 96

    Mostly Sunny

    • 74
    • 96

    Mostly Sunny

Today 3 Aug Hays

Mostly sunny. Highs in the mid 90s. South Winds around 5 Mph, becoming southeast this afternoon.

Tonight 3 Aug Hays

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 70s. Southeast Winds around 5 Mph, becoming southwest around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rio Vista Temperature Statistics

August Temperature

San Marcos, San Marcos Municipal Airport (3.7 miles)

  • Lowest 1 August, 2025

    75 °F

  • Average August

    87.4 °F

  • Highest 1 August, 2025

    100.9 °F

Climate (2020–Present)

San Marcos, San Marcos Municipal Airport (3.7 miles)

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  • Average Low 2020–2025

    59.2 °F

  • Average 2020–2025

    69.8 °F

  • Average High 2020–2025

    81.6 °F
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