Sunday Peak Weather Forecast

    • 51
    • 57

    Sunny

    • 56
    • 65

    Sunny

    • 59
    • 69

    Sunny

    • 59
    • 69

    Mostly Sunny

    • 59
    • 69

    Sunny

    • 58
    • 67

    Sunny

Today 29 Sep South End of the Upper Sierra

Warmer, sunny. Highs 61 to 75. Northwest Winds 5 to 15 Mph. Gusts up to 55 Mph decreasing to 35 Mph in the afternoon.

Tonight 29 Sep South End of the Upper Sierra

Clear. Lows 42 to 56. North Winds 5 to 10 Mph with Gusts to around 40 Mph.

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Sunday Peak Temperature Statistics

September Temperature

Porterville, Porterville Municipal Airport (31.7 miles)

  • Lowest 18 September, 2026

    52 °F

  • Average September

    74.6 °F

  • Highest 10 September, 2026

    105.1 °F

Climate (2021–2026)

Porterville, Porterville Municipal Airport (31.7 miles)

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  • Average Low 2021–2026

    51.7 °F

  • Average 2021–2026

    65 °F

  • Average High 2021–2026

    79 °F
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