Marengo Weather Forecast

    • 72
    • 91

    Slight Chance Thunderstorms

    • 66
    • 93

    Mostly Sunny

    • 69
    • 91

    Mostly Sunny

    • 70
    • 95

    Slight Chance Thunderstorms

    • 61
    • 88

    Mostly Sunny

    • 60
    • 82

    Partly Sunny

Today 17 Jul Iowa

Mostly sunny with a slight chance of Thunderstorms. Isolated Showers. Hot with Highs in the lower 90s. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 100.

Tonight 17 Jul Iowa

Mostly clear. Humid with Lows in the lower 70s. Southwest Winds 5 to 10 Mph.

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Marengo Temperature Statistics

July Temperature

Cedar Rapids Airport (18.6 miles)

  • Lowest 13 July, 2026

    62.1 °F

  • Average July

    76.6 °F

  • Highest 1 July, 2026

    90 °F

Climate (2021–2026)

Cedar Rapids Airport (18.6 miles)

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  • Average Low 2021–2026

    40.5 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    61.5 °F
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