Bonsall Weather Forecast

    • 55
    • 83

    Patchy Fog

    • 54
    • 74

    Increasing Clouds

    • 52
    • 73

    Mostly Cloudy

    • 53
    • 74

    Partly Sunny

    • 53
    • 76

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 54
    • 77

    Partly Sunny

Today 11 May San Diego County Inland Valleys

Mostly sunny. Highs 76 to 81 in the western Valleys to 86 to 91 near the Foothills. Areas of Winds west to 10 Mph becoming 10 to 15 Mph this afternoon.

Tonight 11 May San Diego County Inland Valleys

Partly cloudy. Patchy fog overnight. Lows 52 to 58 in wind Sheltered Areas to 54 to 62 in warmer Locations. Areas of Winds west to 10 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Bonsall Temperature Statistics

May Temperature

Fallbrook Community Airpark (4.3 miles)

  • Lowest 6 May, 2026

    48.2 °F

  • Average May

    61.2 °F

  • Highest 9 May, 2026

    78.8 °F

Climate (2021–Present)

Fallbrook Community Airpark (4.3 miles)

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  • Average Low 2021–2026

    53.7 °F

  • Average 2021–2026

    62.1 °F

  • Average High 2021–2026

    74.5 °F
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