Slate Mountain Weather Forecast

    • 39
    • 48

    Decreasing Clouds

    • 37
    • 49

    Mostly Sunny

    • 37
    • 48

    Mostly Sunny

    • 37
    • 47

    Partly Sunny

    • 33
    • 44

    Partly Sunny

    • 30
    • 41

    Mostly Sunny

    • 30
    • 40

    Mostly Sunny

Today 18 Jan South End of the Upper Sierra

Partly sunny. Highs 49 to 61. Northwest Winds up to 10 Mph.

Tonight 18 Jan South End of the Upper Sierra

Partly cloudy. Lows 32 to 46. Northwest Winds up to 10 Mph with Gusts to around 25 Mph.

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Slate Mountain Temperature Statistics

January Temperature

Porterville, Porterville Municipal Airport (27.3 miles)

  • Lowest 10 January, 2026

    30.9 °F

  • Average January

    48.5 °F

  • Highest 2 January, 2026

    66.9 °F

Climate (2021–Present)

Porterville, Porterville Municipal Airport (27.3 miles)

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  • Average Low 2021–2026

    51.6 °F

  • Average 2021–2026

    64.9 °F

  • Average High 2021–2026

    79 °F
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