Blackrock Mountain Weather Forecast

    • 30
    • 45

    Rain/Snow

    • 25
    • 39

    Snow Showers Likely

    • 25
    • 44

    Slight Chance Snow

    • 28
    • 49

    Mostly Sunny

    • 30
    • 51

    Mostly Sunny

    • 30
    • 52

    Mostly Sunny

    • 30
    • 51

    Partly Sunny

Today 21 Oct South End of the Upper Sierra

Rain Showers likely in the morning. Slight chance of Thunderstorms through the day. Rain Showers in the afternoon. Highs 46 to 60. Southeast Winds 5 to 15 Mph. Gusts up to 35 Mph decreasing to 25 Mph in the afternoon. Chance of precipitation near 100 percent.

Tonight 21 Oct South End of the Upper Sierra

Colder. Rain Showers and slight chance of Thunderstorms in the Evening, then rain Showers, snow Showers and slight chance of Thunderstorms after midnight. Snow may be heavy at Times after midnight. Snow accumulation up to 6 Inches. Lows 31 to 45. South Winds up to 10 Mph with Gusts to around 35 Mph. Chance of precipitation near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Blackrock Mountain Temperature Statistics

October Temperature

Porterville, Porterville Municipal Airport (44.7 miles)

  • Lowest 13 October, 2026

    46 °F

  • Average October

    73.3 °F

  • Highest 4 October, 2026

    100.9 °F

Climate (2021–2026)

Porterville, Porterville Municipal Airport (44.7 miles)

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  • Average Low 2021–2026

    51.9 °F

  • Average 2021–2026

    65.1 °F

  • Average High 2021–2026

    79.2 °F
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