Marietta Weather Forecast

    • 1
    • 19

    Increasing Clouds

    • -3
    • 15

    Partly Sunny

    • -2
    • 11

    Mostly Sunny

    • 6
    • 19

    Chance Snow

    • 16
    • 27

    Chance Snow

    • 15
    • 30

    Mostly Cloudy

Today 28 Jan Marshall

Mostly sunny. Highs around 19. Northwest Winds 5 to 10 Mph.

Tonight 28 Jan Marshall

Mostly clear in the Evening, then becoming mostly cloudy. Lows around 2 above. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Marietta Temperature Statistics

January Temperature

Marshalltown, Marshalltown Municipal Airport (4.3 miles)

  • Lowest 23 January, 2026

    -15.4 °F

  • Average January

    20.2 °F

  • Highest 7 January, 2026

    52.6 °F

Climate (2021–Present)

Marshalltown, Marshalltown Municipal Airport (4.3 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    50.3 °F

  • Average High 2021–2026

    60.9 °F
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