Riverside Weather Forecast

    • 85
    • 105

    Slight Chance Thunderstorms

    • 84
    • 103

    Chance Rain Showers

    • 85
    • 103

    Slight Chance Thunderstorms

    • 81
    • 104

    Chance Thunderstorms

    • 82
    • 101

    Chance Rain Showers

    • 82
    • 100

    Slight Chance Thunderstorms

Today 11 Sep East Valley

Sunny and hot. Highs 101 to 106. Southwest wind 5 to 10 Mph.

Tonight 11 Sep East Valley

Mostly clear with a slight chance of Showers and Thunderstorms. Lows 77 to 86. Southwest wind 5 to 15 Mph. Chance of rain 10 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Riverside Temperature Statistics

September Temperature

Phoenix, Phoenix Sky Harbor International Airport (3.1 miles)

  • Lowest 1 September, 2026

    80.7 °F

  • Average September

    95.6 °F

  • Highest 6 September, 2026

    107.7 °F

Climate (2021–2026)

Phoenix, Phoenix Sky Harbor International Airport (3.1 miles)

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  • Average Low 2021–2026

    66.8 °F

  • Average 2021–2026

    78.1 °F

  • Average High 2021–2026

    89.6 °F
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