Lake Los Serranos Weather Forecast

    • 67
    • 93

    Sunny

    • 68
    • 96

    Mostly Sunny

    • 69
    • 91

    Partly Sunny

    • 67
    • 90

    Chance Rain Showers

    • 67
    • 87

    Slight Chance Thunderstorms

    • 66
    • 90

    Mostly Sunny

    • 67
    • 91

    Mostly Sunny

Today 15 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny. Warmer. Highs 92 to 98. Areas of Winds east to 10 Mph becoming southwest with Gusts to 25 Mph this afternoon.

Tonight 15 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Clear. Lows 64 to 69. Areas of Winds west to 10 Mph in the evening becoming light.

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Lake Los Serranos Temperature Statistics

September Temperature

Chino, Chino Airport (5 miles)

  • Lowest 9 September, 2025

    55 °F

  • Average September

    75.7 °F

  • Highest 2 September, 2025

    104 °F

Climate (2020–Present)

Chino, Chino Airport (5 miles)

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  • Average Low 2020–2025

    52.3 °F

  • Average 2020–2025

    66 °F

  • Average High 2020–2025

    81 °F
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