California Motor Speedway Weather Forecast

    • 50
    • 71

    Patchy Fog

    • 53
    • 77

    Mostly Sunny

    • 54
    • 77

    Partly Sunny

    • 50
    • 67

    Chance Rain Showers

    • 50
    • 68

    Partly Sunny

    • 50
    • 71

    Partly Sunny

    • 52
    • 74

    Partly Sunny

Today 22 Apr San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this morning. Becoming mostly sunny. Highs 68 to 72. Areas of Winds west to 10 Mph. Becoming 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 22 Apr San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy. Patchy fog overnight. Lows 42 to 45 in wind Sheltered Areas to 43 to 49 in warmer Locations. Areas of Winds west 10 to 15 Mph with Gusts to 25 Mph becoming south overnight.

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California Motor Speedway Temperature Statistics

April Temperature

Ontario International Airport (5 miles)

  • Lowest 13 April, 2026

    49.6 °F

  • Average April

    67.3 °F

  • Highest 4 April, 2026

    89.7 °F

Climate (2021–Present)

Ontario International Airport (5 miles)

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  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    67 °F

  • Average High 2021–2026

    79.4 °F
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