Blackrock Mountain Weather Forecast

    • 26
    • 52

    Sunny

    • 33
    • 53

    Sunny

    • 33
    • 54

    Sunny

    • 30
    • 52

    Sunny

    • 26
    • 49

    Mostly Sunny

    • 27
    • 46

    Partly Sunny

Today 9 Dec South End of the Upper Sierra

Sunny. Highs 48 to 60. Northwest Winds up to 10 Mph.

Tonight 9 Dec South End of the Upper Sierra

Clear. Near steady temperature in the mid 40s. North Winds 5 to 10 Mph with Gusts to around 30 Mph.

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Blackrock Mountain Temperature Statistics

December Temperature

Porterville, Porterville Municipal Airport (44.7 miles)

  • Lowest 2 December, 2025

    35.1 °F

  • Average December

    43.8 °F

  • Highest 1 December, 2025

    53.1 °F

Climate (2020–Present)

Porterville, Porterville Municipal Airport (44.7 miles)

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  • Average Low 2020–2025

    51.5 °F

  • Average 2020–2025

    64.9 °F

  • Average High 2020–2025

    79.1 °F
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