Bonsall Weather Forecast

    • 48
    • 71

    Partly Sunny

    • 48
    • 70

    Partly Sunny

    • 54
    • 79

    Mostly Sunny

    • 59
    • 94

    Sunny

    • 58
    • 96

    Partly Sunny

    • 54
    • 91

    Mostly Sunny

    • 54
    • 88

    Mostly Sunny

Today 9 Mar San Diego County Inland Valleys

Partly cloudy. A slight chance of Showers this afternoon. Highs around 71 in the western Valleys to 65 to 70 near the Foothills. Light Winds becoming west 10 to 15 Mph this afternoon. Chance of measurable precipitation 20 percent.

Tonight 9 Mar San Diego County Inland Valleys

Partly cloudy. A slight chance of Showers this evening. Patchy fog overnight. Lows 41 to 51 in wind Sheltered Areas to 48 to 52 in warmer Locations. Areas of Winds west to 10 Mph this evening becoming light. Chance of measurable precipitation 20 percent.

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Bonsall Temperature Statistics

March Temperature

Fallbrook Community Airpark (4.3 miles)

  • Lowest 3 March, 2026

    48.2 °F

  • Average March

    60.3 °F

  • Highest 1 March, 2026

    84.2 °F

Climate (2021–Present)

Fallbrook Community Airpark (4.3 miles)

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  • Average Low 2021–2026

    53.6 °F

  • Average 2021–2026

    61.9 °F

  • Average High 2021–2026

    74.3 °F
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