Rainbow Weather Forecast

    • 52
    • 74

    Decreasing Clouds

    • 55
    • 80

    Mostly Sunny

    • 55
    • 76

    Patchy Fog

    • 55
    • 77

    Mostly Sunny

    • 54
    • 78

    Mostly Sunny

    • 55
    • 78

    Mostly Sunny

Today 18 May San Diego County Inland Valleys

Partly cloudy. Warmer. Highs 72 to 77. Areas of Winds south to 10 Mph becoming west this afternoon.

Tonight 18 May San Diego County Inland Valleys

Partly cloudy. Patchy fog overnight. Lows 49 to 53. Areas of Winds west to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rainbow Temperature Statistics

May Temperature

Fallbrook Community Airpark (6.8 miles)

  • Lowest 6 May, 2026

    48.2 °F

  • Average May

    61.7 °F

  • Highest 11 May, 2026

    82.4 °F

Climate (2021–Present)

Fallbrook Community Airpark (6.8 miles)

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  • Average Low 2021–2026

    53.7 °F

  • Average 2021–2026

    62.1 °F

  • Average High 2021–2026

    74.5 °F
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