Lake Mathews Weather Forecast

    • 59
    • 77

    Rain Showers

    • 53
    • 66

    Rain Showers

    • 54
    • 68

    Mostly Sunny

    • 57
    • 75

    Sunny

    • 58
    • 77

    Partly Sunny

    • 58
    • 78

    Mostly Sunny

Today 21 Oct San Bernardino and Riverside County Valleys-The Inland Empire

Mostly sunny this Morning, then partly cloudy with a slight chance of Showers this afternoon. Highs 73 to 78. Areas of Winds east to 10 Mph becoming south with Gusts to 25 Mph this afternoon. Chance of measurable precipitation 20 percent.

Tonight 21 Oct San Bernardino and Riverside County Valleys-The Inland Empire

A slight chance of Thunderstorms. Showers likely in the Evening, then Showers overnight. Locally heavy rainfall possible overnight. Lows 54 to 59. Areas of Winds south 10 to 15 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Mathews Temperature Statistics

October Temperature

Riverside Municipal Airport (7.5 miles)

  • Lowest 13 October, 2026

    51.7 °F

  • Average October

    78.2 °F

  • Highest 2 October, 2026

    105.7 °F

Climate (2021–2026)

Riverside Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    55.1 °F

  • Average 2021–2026

    67.4 °F

  • Average High 2021–2026

    80.5 °F
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