D Street Park Weather Forecast

    • 68
    • 84

    Rain Showers

    • 65
    • 83

    Chance Rain Showers

    • 64
    • 87

    Mostly Sunny

    • 65
    • 86

    Partly Sunny

    • 67
    • 89

    Mostly Sunny

    • 66
    • 89

    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 62 to 68. Areas of Winds west 10 Mph in the evening becoming light. Chance of measurable precipitation 50 percent.

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D Street Park Temperature Statistics

September Temperature

Ontario International Airport (2.5 miles)

  • Lowest 12 September, 2025

    62.1 °F

  • Average September

    76.9 °F

  • Highest 2 September, 2025

    102 °F

Climate (2020–Present)

Ontario International Airport (2.5 miles)

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  • Average Low 2020–2025

    55.5 °F

  • Average 2020–2025

    66.7 °F

  • Average High 2020–2025

    79.1 °F
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