Julian Weather Forecast

    • 71
    • 90

    Slight Chance Thunderstorms

    • 71
    • 92

    Partly Sunny

    • 68
    • 90

    Slight Chance Thunderstorms

    • 62
    • 86

    Mostly Sunny

    • 57
    • 81

    Sunny

    • 58
    • 80

    Sunny

Today 8 Sep San Diego County Mountains

Mostly sunny this Morning, then partly cloudy with a slight chance of Showers and Thunderstorms this afternoon. Warmer. Highs 86 to 95. Areas of Winds north to 10 Mph becoming west this afternoon. Chance of measurable precipitation 20 percent.

Tonight 8 Sep San Diego County Mountains

Partly cloudy. Lows 65 to 75. Areas of Winds west 10 Mph becoming north overnight.

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Julian Temperature Statistics

September Temperature

Ramona, Ramona Airport (18 miles)

  • Lowest 3 September, 2026

    50 °F

  • Average September

    71.7 °F

  • Highest 5 September, 2026

    91 °F

Climate (2021–2026)

Ramona, Ramona Airport (18 miles)

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  • Average Low 2021–2026

    51.7 °F

  • Average 2021–2026

    64.7 °F

  • Average High 2021–2026

    76.9 °F
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