San Luis County Regional Airport Weather Forecast

    • 54
    • 73

    Gradual Clearing

    • 55
    • 80

    Mostly Sunny

    • 56
    • 82

    Partly Sunny

    • 55
    • 75

    Mostly Cloudy

    • 54
    • 74

    Partly Sunny

    • 56
    • 79

    Mostly Sunny

    • 57
    • 83

    Mostly Sunny

Today 17 Sep San Luis Obispo County Inland Central Coast

Mostly cloudy in the morning then sunny. Highs in the 70s to lower 80s.

Tonight 17 Sep San Luis Obispo County Inland Central Coast

Mostly cloudy. Patchy fog after midnight. Lows in the lower to mid 50s.

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San Luis County Regional Airport Temperature Statistics

September Temperature

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (0 miles)

  • Lowest 7 September, 2026

    49.6 °F

  • Average September

    69.8 °F

  • Highest 9 September, 2026

    107.7 °F

Climate (2021–2026)

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (0 miles)

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  • Average Low 2021–2026

    50.2 °F

  • Average 2021–2026

    61.1 °F

  • Average High 2021–2026

    73.3 °F
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