Horn Weather Forecast

    • 54
    • 67

    Partly Sunny

    • 57
    • 68

    Mostly Cloudy

    • 57
    • 69

    Chance Rain Showers

    • 57
    • 64

    Chance Rain Showers

    • 58
    • 71

    Mostly Cloudy

    • 61
    • 75

    Mostly Cloudy

Today 23 Sep Johnson

Mostly sunny. Highs in the upper 60s. Northeast Winds 5 to 10 Mph.

Tonight 23 Sep Johnson

Partly cloudy. Lows in the lower 50s. East Winds 5 to 10 Mph.

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Horn Temperature Statistics

September Temperature

Iowa City Municipal Airport (1.2 miles)

  • Lowest 13 September, 2026

    55.7 °F

  • Average September

    74.4 °F

  • Highest 1 September, 2026

    95.6 °F

Climate (2021–2026)

Iowa City Municipal Airport (1.2 miles)

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  • Average Low 2021–2026

    42.7 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    63.3 °F
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