Ross Lake Weather Forecast

    • 52
    • 69

    Mostly Cloudy

    • 52
    • 65

    Chance Rain Showers

    • 52
    • 62

    Chance Rain Showers

    • 46
    • 64

    Slight Chance Rain Showers

    • 47
    • 66

    Partly Sunny

    • 48
    • 69

    Partly Sunny

    • 51
    • 71

    Partly Sunny

Today 21 Jan San Diego County Inland Valleys

Areas of fog this morning. Mostly cloudy. Local visibility one quarter mile or less at Times this morning. Highs 69 to 74. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 21 Jan San Diego County Inland Valleys

Mostly cloudy. Patchy fog. Lows 42 to 50 in wind Sheltered Areas to 48 to 53 in warmer Locations. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ross Lake Temperature Statistics

January Temperature

Fallbrook Community Airpark (6.2 miles)

  • Lowest 8 January, 2026

    44.6 °F

  • Average January

    59.6 °F

  • Highest 14 January, 2026

    84.2 °F

Climate (2021–Present)

Fallbrook Community Airpark (6.2 miles)

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  • Average Low 2021–2026

    53.5 °F

  • Average 2021–2026

    61.8 °F

  • Average High 2021–2026

    74.1 °F
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