Fallbrook Weather Forecast

    • 69
    • 90

    Slight Chance Thunderstorms

    • 70
    • 91

    Slight Chance Thunderstorms

    • 68
    • 91

    Slight Chance Thunderstorms

    • 66
    • 88

    Slight Chance Thunderstorms

    • 64
    • 84

    Chance Thunderstorms

    • 63
    • 84

    Slight Chance Thunderstorms

Today 22 Aug San Diego County Inland Valleys

Mostly sunny. Highs 88 to 93 in the western Valleys to 95 to 100 near the Foothills. Areas of Winds west to 10 Mph.

Tonight 22 Aug San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy. Lows 68 to 72. Areas of Winds west to 10 Mph in the evening becoming light.

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Fallbrook Temperature Statistics

August Temperature

Fallbrook Community Airpark (1.2 miles)

  • Lowest 2 August, 2025

    57.2 °F

  • Average August

    69.2 °F

  • Highest 7 August, 2025

    96.8 °F

Climate (2020–Present)

Fallbrook Community Airpark (1.2 miles)

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  • Average Low 2020–2025

    53.4 °F

  • Average 2020–2025

    61.8 °F

  • Average High 2020–2025

    74.2 °F
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