Muscupiabe Weather Forecast

    • 74
    • 97

    Hot

    • 76
    • 101

    Hot

    • 73
    • 99

    Hot

    • 67
    • 95

    Mostly Sunny

    • 65
    • 92

    Sunny

    • 66
    • 91

    Sunny

Today 8 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. A slight chance of Showers and Thunderstorms in the afternoon. Warmer. Highs 97 to 101. Light Winds becoming west 10 Mph in the afternoon. Chance of measurable precipitation 20 percent.

Tonight 8 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 70 to 75. Areas of Winds west to 10 Mph in the evening becoming light.

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Muscupiabe Temperature Statistics

September Temperature

San Bernardino Intl. Airport (4.3 miles)

  • Lowest 2 September, 2026

    59 °F

  • Average September

    71.7 °F

  • Highest 5 September, 2026

    95 °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

    80.4 °F
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