Tiffin Weather Forecast

    • 62
    • 81

    Chance Rain Showers

    • 58
    • 80

    Mostly Sunny

    • 66
    • 83

    Rain Showers Likely

    • 61
    • 81

    Chance Rain Showers

    • 67
    • 81

    Chance Thunderstorms

    • 62
    • 86

    Rain Showers Likely

Today 9 Sep Johnson

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms late this Morning, then a slight chance of Showers this afternoon. Highs in the lower 80s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 9 Sep Johnson

Partly cloudy. Humid with Lows in the lower 60s. Northwest Winds around 5 Mph.

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Tiffin Temperature Statistics

September Temperature

Iowa City Municipal Airport (7.5 miles)

  • Lowest 7 September, 2026

    66 °F

  • Average September

    82 °F

  • Highest 1 September, 2026

    95.6 °F

Climate (2021–2026)

Iowa City Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    63.3 °F
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