Shirrells Weather Forecast

    • 68
    • 86

    Rain Showers

    • 64
    • 87

    Chance Rain Showers

    • 63
    • 89

    Mostly Sunny

    • 65
    • 88

    Partly Sunny

    • 68
    • 92

    Partly Sunny

    • 66
    • 91

    Mostly Sunny

Today 18 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Showers and a slight chance of Thunderstorms this Morning, then Showers and a chance of Thunderstorms this afternoon. Highs 83 to 88. Areas of Winds north 10 Mph becoming west with Gusts to 25 Mph this afternoon.

Tonight 18 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy with a slight chance of Thunderstorms. A chance of Showers. Lows 61 to 68. Areas of Winds southwest 10 to 15 Mph this evening becoming light. Chance of measurable precipitation 50 percent.

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Shirrells Temperature Statistics

September Temperature

San Bernardino Intl. Airport (5 miles)

  • Lowest 9 September, 2025

    60.8 °F

  • Average September

    75.4 °F

  • Highest 1 September, 2025

    100.4 °F

Climate (2020–Present)

San Bernardino Intl. Airport (5 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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