Thornton Weather Forecast

    • 61
    • 93

    Becoming Sunny

    • 62
    • 98

    Hot

    • 63
    • 98

    Mostly Sunny

    • 63
    • 90

    Partly Sunny

    • 61
    • 87

    Partly Sunny

    • 60
    • 85

    Partly Sunny

Today 15 Sep Northern San Joaquin Valley

Sunny. Highs 87 to 95. Northwest Winds up to 10 Mph.

Tonight 15 Sep Northern San Joaquin Valley

Clear. Lows 62 to 70. Light Winds.

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Thornton Temperature Statistics

September Temperature

Sacramento Executive Airport (19.3 miles)

  • Lowest 5 September, 2025

    57.9 °F

  • Average September

    71.8 °F

  • Highest 1 September, 2025

    100.9 °F

Climate (2020–Present)

Sacramento Executive Airport (19.3 miles)

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  • Average Low 2020–2025

    49.9 °F

  • Average 2020–2025

    61.6 °F

  • Average High 2020–2025

    75.9 °F
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