Dupo Weather Forecast

    • 10
    • 40

    Increasing Clouds

    • 5
    • 15

    Chance Snow

    • 10
    • 13

    Snow

    • 0
    • 18

    Slight Chance Snow

    • 6
    • 19

    Mostly Sunny

    • 15
    • 34

    Partly Sunny

    • 6
    • 28

    Partly Sunny

Today 22 Jan St. Clair

Mostly sunny. Near steady temperature in the upper 30s. Northwest Winds around 5 Mph.

Tonight 22 Jan St. Clair

Mostly clear in the Evening, then becoming mostly cloudy. Cooler with Lows around 9 above. North Winds 5 to 10 Mph, increasing to 15 to 20 Mph after midnight. Wind chill Values as low as 1 below after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Dupo Temperature Statistics

January Temperature

St. Louis Downtown Airport (4.3 miles)

  • Lowest 20 January, 2026

    8.1 °F

  • Average January

    36.8 °F

  • Highest 6 January, 2026

    68 °F

Climate (2021–Present)

St. Louis Downtown Airport (4.3 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    68.7 °F
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