Spring Valley Weather Forecast

    • 52
    • 74

    Patchy Fog

    • 51
    • 74

    Decreasing Clouds

    • 53
    • 78

    Mostly Sunny

    • 54
    • 79

    Mostly Sunny

    • 54
    • 76

    Partly Sunny

    • 54
    • 76

    Patchy Fog

    • 52
    • 76

    Patchy Fog

Today 13 Dec San Diego County Inland Valleys

Mostly sunny. Highs 72 to 77 in the western Valleys to 76 to 81 near the Foothills. Light Winds.

Tonight 13 Dec San Diego County Inland Valleys

Partly cloudy. Patchy fog. Local visibility one quarter mile or less at Times. Lows 45 to 54 in wind Sheltered Areas to 50 to 58 in warmer Locations. Light Winds.

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Spring Valley Temperature Statistics

December Temperature

Gillespie Field Airport (5.6 miles)

  • Lowest 5 December, 2025

    39.2 °F

  • Average December

    53.9 °F

  • Highest 10 December, 2025

    86 °F

Climate (2020–Present)

Gillespie Field Airport (5.6 miles)

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  • Average Low 2020–2025

    53 °F

  • Average 2020–2025

    60.1 °F

  • Average High 2020–2025

    75.8 °F
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