Muscupiabe Weather Forecast

    • 61
    • 88

    Becoming Sunny

    • 61
    • 85

    Mostly Sunny

    • 62
    • 86

    Sunny

    • 64
    • 89

    Sunny

    • 64
    • 91

    Mostly Sunny

    • 62
    • 89

    Mostly Sunny

Today 15 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy with patchy fog this morning. Becoming sunny. Highs 83 to 88. Areas of Winds south to 10 Mph becoming southwest with Gusts to 25 Mph this afternoon.

Tonight 15 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. Patchy fog overnight. Lows 53 to 61. Areas of Winds southwest 10 to 15 Mph with Gusts to 25 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Muscupiabe Temperature Statistics

September Temperature

San Bernardino Intl. Airport (4.3 miles)

  • Lowest 2 September, 2026

    59 °F

  • Average September

    77.1 °F

  • Highest 9 September, 2026

    105.8 °F

Climate (2021–2026)

San Bernardino Intl. Airport (4.3 miles)

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  • Average Low 2021–2026

    54.2 °F

  • Average 2021–2026

    63.2 °F

  • Average High 2021–2026

    80.3 °F
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