Riverside Weather Forecast

    • 65
    • 76

    Rain Showers

    • 65
    • 72

    Rain Showers

    • 57
    • 70

    Rain Showers

    • 49
    • 65

    Partly Sunny

    • 51
    • 66

    Partly Sunny

    • 47
    • 65

    Mostly Sunny

Today 29 Sep Washington

Mostly cloudy. Near steady temperature in the mid 70s. South Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 29 Sep Washington

Cloudy with a slight chance of Thunderstorms. A slight chance of Showers in the Evening, then Showers after midnight. Not as cool with Lows in the mid 60s. South Winds 5 to 10 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Riverside Temperature Statistics

September Temperature

Iowa City Municipal Airport (10.6 miles)

  • Lowest 23 September, 2026

    51.7 °F

  • Average September

    71.4 °F

  • Highest 1 September, 2026

    95.6 °F

Climate (2021–2026)

Iowa City Municipal Airport (10.6 miles)

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  • Average Low 2021–2026

    42.7 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    63.2 °F
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