Spring Valley Weather Forecast

    • 66
    • 85

    Increasing Clouds

    • 66
    • 84

    Mostly Sunny

    • 66
    • 84

    Mostly Sunny

    • 67
    • 85

    Mostly Sunny

    • 67
    • 86

    Mostly Sunny

    • 67
    • 86

    Mostly Sunny

Today 3 Aug San Diego County Inland Valleys

Mostly sunny. Highs 84 to 89 in the western Valleys to 93 to 98 near the Foothills. Areas of Winds west to 10 Mph becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 3 Aug San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 62 to 67. Areas of Winds west to 10 Mph in the evening becoming light.

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Spring Valley Temperature Statistics

August Temperature

Gillespie Field Airport (5.6 miles)

  • Lowest 1 August, 2026

    68 °F

  • Average August

    74.8 °F

  • Highest 1 August, 2026

    91.4 °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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