Spring Valley Weather Forecast

    • 76
    • 97

    Hot

    • 75
    • 97

    Hot

    • 70
    • 93

    Mostly Sunny

    • 66
    • 87

    Mostly Sunny

    • 64
    • 82

    Mostly Sunny

    • 63
    • 81

    Mostly Sunny

Today 8 Sep San Diego County Inland Valleys

Partly cloudy. A slight chance of Showers and Thunderstorms this afternoon. Highs 96 to 101. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon. Chance of measurable precipitation 20 percent.

Tonight 8 Sep San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy. Lows 73 to 78. Areas of Winds west 10 to 15 Mph with Gusts to 25 Mph in the evening becoming light.

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Spring Valley Temperature Statistics

September Temperature

Gillespie Field Airport (5.6 miles)

  • Lowest 3 September, 2026

    57.2 °F

  • Average September

    71.5 °F

  • Highest 5 September, 2026

    95 °F

Climate (2021–2026)

Gillespie Field Airport (5.6 miles)

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  • Average Low 2021–2026

    53.5 °F

  • Average 2021–2026

    60.6 °F

  • Average High 2021–2026

    76.3 °F
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