Spring Valley Weather Forecast

    • 60
    • 77

    Mostly Cloudy

    • 58
    • 69

    Rain Showers

    • 55
    • 65

    Rain Showers

    • 54
    • 66

    Mostly Cloudy

    • 52
    • 65

    Chance Rain Showers

    • 48
    • 65

    Slight Chance Rain Showers

    • 49
    • 66

    Mostly Cloudy

Today 30 Dec San Diego County Inland Valleys

Sunny. Highs around 74 in the western Valleys to 65 to 70 near the Foothills. Areas of Winds east 20 to 30 Mph. Gusts to 45 Mph. Becoming 40 Mph in the afternoon.

Tonight 30 Dec San Diego County Inland Valleys

Mostly cloudy. A slight chance of Sprinkles this Evening, then a slight chance of Showers overnight. Lows 52 to 60 in wind Sheltered Areas to 57 to 61 in warmer Locations. Areas of Winds east 10 to 20 Mph. Gusts to 35 Mph. Becoming 25 Mph overnight. Chance of measurable precipitation 20 percent.

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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

    54.4 °F

  • Highest 10 December, 2025

    86 °F

Climate (2020–Present)

Gillespie Field Airport (5.6 miles)

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  • Average Low 2020–2025

    53.1 °F

  • Average 2020–2025

    60.2 °F

  • Average High 2020–2025

    75.8 °F
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