Tustin Weather Forecast

    • 47
    • 66

    Partly Sunny

    • 44
    • 63

    Breezy

    • 45
    • 65

    Mostly Sunny

    • 49
    • 72

    Mostly Sunny

    • 50
    • 73

    Partly Sunny

    • 52
    • 74

    Mostly Sunny

    • 53
    • 76

    Mostly Sunny

Today 7 Jan Orange County Inland

Partly cloudy. A slight chance of Showers this morning. Highs 63 to 66. Light Winds becoming west 10 Mph this afternoon. Chance of measurable precipitation 20 percent.

Tonight 7 Jan Orange County Inland

Partly cloudy this evening. Becoming mostly clear. Lows 44 to 47. Areas of Winds south to 10 Mph.

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Tustin Temperature Statistics

January Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 5 January, 2026

    53.1 °F

  • Average January

    60.6 °F

  • Highest 2 January, 2026

    68 °F

Climate (2021–Present)

John Wayne-Orange County Airport (5 miles)

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  • Average Low 2021–2026

    58.8 °F

  • Average 2021–2026

    65.7 °F

  • Average High 2021–2026

    73.4 °F
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