Downtown Riverside Weather Forecast

    • 72
    • 93

    Mostly Sunny

    • 74
    • 95

    Mostly Sunny

    • 75
    • 101

    Hot

    • 73
    • 100

    Hot

    • 68
    • 96

    Mostly Sunny

    • 66
    • 91

    Mostly Sunny

Today 7 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Partly cloudy in the morning. Becoming mostly sunny. Warmer. Highs 90 to 95. Light Winds becoming west 10 to 15 Mph in the afternoon.

Tonight 7 Sep San Bernardino and Riverside County Valleys-The Inland Empire

Mostly clear. Lows 67 to 72. Areas of Winds west 10 to 15 Mph in the evening becoming light.

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Downtown Riverside Temperature Statistics

September Temperature

Riverside Municipal Airport (3.7 miles)

  • Lowest 2 September, 2026

    60.7 °F

  • Average September

    74.6 °F

  • Highest 1 September, 2026

    91.7 °F

Climate (2021–2026)

Riverside Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    54.9 °F

  • Average 2021–2026

    67.3 °F

  • Average High 2021–2026

    80.4 °F
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