Roosevelt Weather Forecast

    • 73
    • 100

    Hot

    • 70
    • 96

    Rain Showers Likely

    • 67
    • 88

    Rain Showers Likely

    • 65
    • 85

    Chance Thunderstorms

    • 66
    • 89

    Mostly Sunny

    • 67
    • 91

    Mostly Sunny

Today 16 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Highs 95 to 101. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 16 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear in the evening. Becoming partly cloudy. Lows 68 to 72. Areas of Winds west 10 to 15 Mph in the evening becoming light.

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  • Temperature Real-Time

Roosevelt Temperature Statistics

September Temperature

San Bernardino Intl. Airport (3.7 miles)

  • Lowest 9 September, 2025

    60.8 °F

  • Average September

    75.2 °F

  • Highest 1 September, 2025

    100.4 °F

Climate (2020–Present)

San Bernardino Intl. Airport (3.7 miles)

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  • Average Low 2020–2025

    54.1 °F

  • Average 2020–2025

    63.2 °F

  • Average High 2020–2025

    80.5 °F
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