Tiffin Weather Forecast

    • 76
    • 93

    Chance Thunderstorms

    • 72
    • 93

    Partly Sunny

    • 67
    • 88

    Mostly Sunny

    • 67
    • 88

    Mostly Sunny

    • 68
    • 87

    Slight Chance Thunderstorms

    • 67
    • 87

    Chance Thunderstorms

Today 26 Jul Johnson

Partly sunny. A chance of Showers and Thunderstorms, mainly in the morning. Hot with Highs in the lower 90s. South Winds 5 to 10 Mph, becoming southwest in the afternoon. Chance of rain 30 percent. Heat index Values up to 110 in the afternoon.

Tonight 26 Jul Johnson

Partly cloudy. Humid with Lows in the mid 70s. Southwest Winds 5 to 10 Mph. Heat index Values up to 109 early in the evening.

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Tiffin Temperature Statistics

July Temperature

Iowa City Municipal Airport (7.5 miles)

  • Lowest 23 July, 2026

    55.9 °F

  • Average July

    78.2 °F

  • Highest 1 July, 2026

    93 °F

Climate (2021–2026)

Iowa City Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    42.5 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    63.3 °F
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