Spring Valley Weather Forecast

    • 61
    • 81

    Increasing Clouds

    • 62
    • 79

    Rain Showers

    • 57
    • 70

    Rain Showers

    • 56
    • 72

    Mostly Sunny

    • 58
    • 78

    Mostly Sunny

    • 60
    • 81

    Partly Sunny

    • 60
    • 83

    Mostly Sunny

Today 20 Oct San Diego County Inland Valleys

Partly cloudy in the morning. Becoming mostly sunny. Highs 81 to 84 in the western Valleys to 73 to 78 near the Foothills.

Tonight 20 Oct San Diego County Inland Valleys

Partly cloudy. Patchy fog overnight. Lows 55 to 60. Light Winds.

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Spring Valley Temperature Statistics

October Temperature

Gillespie Field Airport (5.6 miles)

  • Lowest 14 October, 2026

    50 °F

  • Average October

    72.8 °F

  • Highest 3 October, 2026

    105.8 °F

Climate (2021–2026)

Gillespie Field Airport (5.6 miles)

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  • Average Low 2021–2026

    53.7 °F

  • Average 2021–2026

    60.8 °F

  • Average High 2021–2026

    76.5 °F
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