Rainbow Weather Forecast

    • 54
    • 81

    Sunny

    • 54
    • 79

    Mostly Sunny

    • 54
    • 79

    Partly Sunny

    • 53
    • 79

    Partly Sunny

    • 54
    • 76

    Partly Sunny

    • 51
    • 75

    Mostly Sunny

    • 50
    • 72

    Mostly Sunny

Today 15 Jan San Diego County Inland Valleys

Sunny. Highs around 80 in the western Valleys to 74 to 79 near the Foothills. Areas of Winds east 10 to 20 Mph with Gusts to 35 Mph becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 15 Jan San Diego County Inland Valleys

Clear. Lows 45 to 52 in wind Sheltered Areas to 50 to 56 in warmer Locations. Areas of Winds east to 10 Mph in the evening becoming light.

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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

    57.2 °F

  • Highest 13 January, 2026

    78.8 °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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