Blackrock Mountain Weather Forecast

    • 34
    • 59

    Slight Chance Thunderstorms

    • 29
    • 47

    Chance Snow Showers

    • 34
    • 52

    Mostly Sunny

    • 32
    • 55

    Partly Sunny

    • 29
    • 51

    Mostly Cloudy

    • 28
    • 46

    Mostly Sunny

    • 30
    • 49

    Mostly Sunny

Today 21 Oct South End of the Upper Sierra

Sunny. Highs 59 to 73. East Winds up to 10 Mph with Gusts to around 25 Mph shifting to the south in the afternoon.

Tonight 21 Oct South End of the Upper Sierra

Mostly cloudy. Slight chance of rain late in the evening. Slight chance of Thunderstorms after Midnight, then slight chance of rain late in the night. Lows 37 to 51. East Winds up to 10 Mph. Chance of precipitation 20 percent.

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Blackrock Mountain Temperature Statistics

October Temperature

Porterville, Porterville Municipal Airport (44.7 miles)

  • Lowest 15 October, 2025

    45 °F

  • Average October

    64.2 °F

  • Highest 7 October, 2025

    91 °F

Climate (2020–Present)

Porterville, Porterville Municipal Airport (44.7 miles)

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  • Average Low 2020–2025

    51.3 °F

  • Average 2020–2025

    64.8 °F

  • Average High 2020–2025

    79.2 °F
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