Byron Weather Forecast

    • 50
    • 72

    Increasing Clouds

    • 54
    • 71

    Chance Rain Showers

    • 52
    • 72

    Chance Rain Showers

    • 50
    • 70

    Slight Chance Rain Showers

    • 48
    • 72

    Mostly Sunny

    • 50
    • 73

    Mostly Sunny

Today 19 Oct East Bay Interior Valleys

Sunny late in the morning then becoming partly cloudy. Highs near 70. West Winds 10 to 15 Mph.

Tonight 19 Oct East Bay Interior Valleys

Mostly cloudy. Lows in the upper 40s. Southwest Winds 10 to 15 Mph decreasing to up to 5 Mph after midnight.

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Byron Temperature Statistics

October Temperature

Livermore, Livermore Municipal Airport (14.9 miles)

  • Lowest 11 October, 2026

    45.6 °F
  • Average October

    72.3 °F
  • Highest 6 October, 2026

    102.7 °F

Climate (2021–2026)

Livermore, Livermore Municipal Airport (14.9 miles)

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  • Average Low 2021–2026

    49.1 °F
  • Average 2021–2026

    61.1 °F
  • Average High 2021–2026

    74.2 °F
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