Spring Valley Weather Forecast

    • 67
    • 86

    Decreasing Clouds

    • 67
    • 86

    Mostly Sunny

    • 67
    • 85

    Mostly Sunny

    • 68
    • 87

    Mostly Sunny

    • 67
    • 86

    Mostly Sunny

    • 67
    • 88

    Mostly Sunny

Today 20 Jul San Diego County Inland Valleys

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs 86 to 91. Areas of Winds west to 10 Mph becoming 10 to 15 Mph this afternoon.

Tonight 20 Jul San Diego County Inland Valleys

Mostly clear. Lows 63 to 68. Areas of Winds west to 10 Mph in the evening becoming light.

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Spring Valley Temperature Statistics

July Temperature

Gillespie Field Airport (5.6 miles)

  • Lowest 2 July, 2026

    60.8 °F

  • Average July

    70.5 °F

  • Highest 15 July, 2026

    93.2 °F

Climate (2021–2026)

Gillespie Field Airport (5.6 miles)

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  • Average Low 2021–2026

    53.5 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    76.2 °F
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