Slate Mountain Weather Forecast

    • 52
    • 64

    Sunny

    • 48
    • 60

    Sunny

    • 49
    • 60

    Sunny

    • 53
    • 63

    Sunny

    • 55
    • 66

    Sunny

    • 59
    • 69

    Mostly Sunny

    • 61
    • 71

    Mostly Sunny

Today 15 Aug South End of the Upper Sierra

Sunny. Highs 69 to 83. East Winds up to 10 Mph shifting to the southwest in the afternoon. Gusts up to 30 Mph.

Tonight 15 Aug South End of the Upper Sierra

Clear. Lows 45 to 59. Northwest Winds up to 10 Mph with Gusts to around 30 Mph.

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Slate Mountain Temperature Statistics

August Temperature

Porterville, Porterville Municipal Airport (27.3 miles)

  • Lowest 4 August, 2025

    57.9 °F

  • Average August

    81.9 °F

  • Highest 10 August, 2025

    104 °F

Climate (2020–Present)

Porterville, Porterville Municipal Airport (27.3 miles)

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  • Average Low 2020–2025

    51.4 °F

  • Average 2020–2025

    64.9 °F

  • Average High 2020–2025

    79.3 °F
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