Rio Vista Weather Forecast

    • 70
    • 88

    Becoming Sunny

    • 68
    • 90

    Rain Showers

    • 62
    • 81

    Partly Sunny

    • 63
    • 83

    Partly Sunny

    • 65
    • 87

    Partly Sunny

    • 67
    • 89

    Mostly Cloudy

Today 9 May Hays

Patchy fog this morning. Mostly cloudy with a slight chance of Showers and Thunderstorms this Morning, then partly cloudy this afternoon. Not as cool with Highs in the upper 80s. Northeast Winds around 5 Mph, becoming southeast this afternoon. Chance of rain 20 percent.

Tonight 9 May Hays

Mostly clear. Lows around 70. South Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Rio Vista Temperature Statistics

May Temperature

San Marcos, San Marcos Municipal Airport (3.7 miles)

  • Lowest 2 May, 2026

    50 °F

  • Average May

    68.1 °F

  • Highest 5 May, 2026

    84 °F

Climate (2021–Present)

San Marcos, San Marcos Municipal Airport (3.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    60 °F

  • Average 2021–2026

    70.7 °F

  • Average High 2021–2026

    82.3 °F
Get WillyWeather+ to remove ads