Rock Valley Weather Forecast

    • 36
    • 41

    Areas Fog

    • 20
    • 50

    Mostly Cloudy

    • 6
    • 27

    Chance Snow

    • 10
    • 19

    Mostly Sunny

    • 14
    • 38

    Mostly Cloudy

    • 9
    • 26

    Mostly Cloudy

Today 26 Dec Sioux

Mostly sunny Early, then becoming mostly cloudy. Patchy dense fog. Highs in the lower 40s. Northwest Winds around 5 Mph, becoming south around 5 Mph.

Tonight 26 Dec Sioux

Mostly cloudy. Areas of fog in the Evening, then patchy fog after midnight. Near steady temperature in the upper 30s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Valley Temperature Statistics

December Temperature

Sheldon (23 miles)

  • Lowest 14 December, 2025

    -18.4 °F

  • Average December

    20.4 °F

  • Highest 16 December, 2025

    42.8 °F

Climate (2020–Present)

Sheldon (23 miles)

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  • Average Low 2020–2025

    36.2 °F

  • Average 2020–2025

    47.3 °F

  • Average High 2020–2025

    58 °F
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