Spring Valley Weather Forecast

    • 67
    • 86

    Chance Rain Showers

    • 66
    • 82

    Partly Sunny

    • 66
    • 83

    Partly Sunny

    • 68
    • 85

    Partly Sunny

    • 68
    • 86

    Partly Sunny

    • 66
    • 86

    Mostly Sunny

Today 18 Sep San Diego County Inland Valleys

Partly cloudy with a chance of Showers and a slight chance of Thunderstorms. Highs 83 to 88. Areas of Winds south to 10 Mph. Chance of measurable precipitation 50 percent.

Tonight 18 Sep San Diego County Inland Valleys

Partly cloudy with a slight chance of Showers and Thunderstorms. Lows 62 to 67. Areas of Winds southwest to 10 Mph in the evening becoming light. Chance of measurable precipitation 20 percent.

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Spring Valley Temperature Statistics

September Temperature

Gillespie Field Airport (5.6 miles)

  • Lowest 6 September, 2025

    62.6 °F

  • Average September

    71.7 °F

  • Highest 7 September, 2025

    95 °F

Climate (2020–Present)

Gillespie Field Airport (5.6 miles)

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  • Average Low 2020–2025

    52.9 °F

  • Average 2020–2025

    60.2 °F

  • Average High 2020–2025

    75.9 °F
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