Rio Vista Weather Forecast

    • 49
    • 59

    Mostly Cloudy

    • 53
    • 57

    Rain Showers

    • 54
    • 55

    Rain Showers

    • 55
    • 58

    Rain Showers

    • 51
    • 57

    Rain Showers Likely

    • 48
    • 54

    Rain Showers

    • 49
    • 53

    Rain Showers Likely

Today 18 Dec Carquinez Strait and Delta

Widespread fog. Locally dense in the morning. Mostly cloudy. Highs around 58. Light Winds.

Tonight 18 Dec Carquinez Strait and Delta

Mostly cloudy. Patchy fog after midnight. Widespread fog. Locally dense late in the night. A slight chance of rain Showers late in the night. Lows around 49. South Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rio Vista Temperature Statistics

December Temperature

Fairfield / Travis Air Force Base (15.5 miles)

  • Lowest 4 December, 2025

    35.2 °F

  • Average December

    44.2 °F

  • Highest 3 December, 2025

    64.8 °F

Climate (2020–Present)

Fairfield / Travis Air Force Base (15.5 miles)

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  • Average Low 2020–2025

    48.6 °F

  • Average 2020–2025

    60.4 °F

  • Average High 2020–2025

    75 °F
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