Arroyo Grande Weather Forecast

    • 49
    • 65

    Patchy Fog

    • 50
    • 65

    Patchy Fog

    • 50
    • 67

    Patchy Fog

    • 49
    • 64

    Partly Sunny

    • 46
    • 64

    Partly Sunny

    • 49
    • 65

    Mostly Sunny

    • 50
    • 65

    Mostly Sunny

Today 22 May San Luis Obispo County Beaches

Partly cloudy. Highs in the upper 50s to mid 60s.

Tonight 22 May San Luis Obispo County Beaches

Low Clouds and fog. Lows in the mid 40s to around 50.

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Arroyo Grande Temperature Statistics

May Temperature

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (8.1 miles)

  • Lowest 18 May, 2026

    43 °F

  • Average May

    60.8 °F

  • Highest 19 May, 2026

    86 °F

Climate (2021–Present)

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (8.1 miles)

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  • Average Low 2021–2026

    50.2 °F

  • Average 2021–2026

    60.8 °F

  • Average High 2021–2026

    73.2 °F
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