Blackrock Mountain Weather Forecast

    • 25
    • 41

    Sunny

    • 27
    • 41

    Mostly Sunny

    • 30
    • 48

    Mostly Sunny

    • 32
    • 51

    Mostly Sunny

    • 33
    • 53

    Sunny

    • 32
    • 52

    Sunny

Today 6 Dec South End of the Upper Sierra

Sunny. Highs 41 to 53. West Winds up to 10 Mph.

Tonight 6 Dec South End of the Upper Sierra

Clear. Near steady temperature in the mid 30s. Northwest Winds up to 10 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

    43.4 °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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