Rainbow Weather Forecast

    • 50
    • 65

    Chance Rain Showers

    • 50
    • 64

    Mostly Cloudy

    • 45
    • 63

    Partly Sunny

    • 46
    • 65

    Partly Sunny

    • 46
    • 68

    Partly Sunny

    • 48
    • 70

    Partly Sunny

    • 50
    • 69

    Mostly Cloudy

Today 22 Jan San Diego County Inland Valleys

Mostly cloudy. Patchy fog this morning. A slight chance of Showers this Morning, then a chance of Showers this afternoon. Highs 64 to 69. Light Winds. Chance of measurable precipitation 30 percent.

Tonight 22 Jan San Diego County Inland Valleys

Partly cloudy this evening. Becoming cloudy. A chance of Showers. Patchy fog overnight. Lows 42 to 51 in wind Sheltered Areas to 48 to 52 in warmer Locations. Light Winds. Chance of measurable precipitation 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rainbow Temperature Statistics

January Temperature

Fallbrook Community Airpark (6.8 miles)

  • Lowest 8 January, 2026

    44.6 °F

  • Average January

    59.7 °F

  • Highest 14 January, 2026

    84.2 °F

Climate (2021–Present)

Fallbrook Community Airpark (6.8 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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