Portage Des Sioux Weather Forecast

    • 35
    • 55

    Becoming Sunny

    • 36
    • 60

    Chance Rain

    • 17
    • 42

    Mostly Cloudy

    • 24
    • 32

    Mostly Cloudy

    • 18
    • 43

    Mostly Cloudy

    • 8
    • 28

    Mostly Cloudy

    • 13
    • 26

    Partly Sunny

Today 12 Jan St. Charles

Sunny. Not as cool with Highs in the mid 50s. Temperature falling to around 50 late. Southwest Winds 5 to 10 Mph.

Tonight 12 Jan St. Charles

Partly cloudy this Evening, then becoming mostly clear. Not as cool with Lows in the upper 30s. Southwest Winds 5 to 10 Mph. Gusts up to 25 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portage Des Sioux Temperature Statistics

January Temperature

St. Charles, St. Charles County Smartt Airport (4.3 miles)

  • Lowest 7 January, 2026

    28 °F

  • Average January

    49.2 °F

  • Highest 6 January, 2026

    66 °F

Climate (2021–Present)

St. Charles, St. Charles County Smartt Airport (4.3 miles)

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  • Average Low 2021–2026

    47.5 °F

  • Average 2021–2026

    57.9 °F

  • Average High 2021–2026

    68.6 °F
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