Rock Valley Weather Forecast

    • 70
    • 90

    Increasing Clouds

    • 67
    • 80

    Rain Showers Likely

    • 70
    • 87

    Chance Thunderstorms

    • 60
    • 86

    Chance Rain Showers

    • 56
    • 81

    Partly Sunny

    • 59
    • 82

    Slight Chance Thunderstorms

    • 59
    • 84

    Mostly Sunny

Today 5 Sep Sioux

Mostly cloudy Early, then becoming partly sunny. A chance of Showers early. Highs in the mid 80s. East Winds around 15 Mph, becoming southeast. Chance of rain 50 percent.

Tonight 5 Sep Sioux

Mostly clear this Evening, then becoming mostly cloudy. Lows in the lower 70s. Southeast Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Valley Temperature Statistics

September Temperature

Sheldon (23 miles)

  • Lowest 1 September, 2026

    64.4 °F

  • Average September

    76 °F

  • Highest 1 September, 2026

    87.8 °F

Climate (2021–2026)

Sheldon (23 miles)

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  • Average Low 2021–2026

    36.2 °F

  • Average 2021–2026

    47.3 °F

  • Average High 2021–2026

    58.2 °F
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