Arlington South Weather Forecast

    • 63
    • 84

    Increasing Clouds

    • 62
    • 80

    Partly Sunny

    • 64
    • 82

    Mostly Sunny

    • 68
    • 93

    Sunny

    • 68
    • 95

    Mostly Sunny

    • 67
    • 93

    Mostly Sunny

    • 67
    • 90

    Partly Sunny

Today 20 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy in the morning. Becoming mostly sunny. Highs 84 to 89.

Tonight 20 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy this evening. Becoming mostly cloudy. Lows 56 to 62. Areas of Winds west 10 Mph this evening becoming light.

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Arlington South Temperature Statistics

September Temperature

Riverside Municipal Airport (3.1 miles)

  • Lowest 5 September, 2026

    59.6 °F

  • Average September

    79.5 °F

  • Highest 9 September, 2026

    110.6 °F

Climate (2021–2026)

Riverside Municipal Airport (3.1 miles)

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  • Average Low 2021–2026

    55 °F

  • Average 2021–2026

    67.3 °F

  • Average High 2021–2026

    80.4 °F
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