Tiffin Weather Forecast

    • 48
    • 74

    Chance Rain Showers

    • 53
    • 63

    Rain Showers

    • 46
    • 64

    Rain Showers

    • 44
    • 56

    Rain Showers Likely

    • 43
    • 64

    Partly Sunny

    • 48
    • 67

    Partly Sunny

    • 49
    • 71

    Partly Sunny

Today 18 May Johnson

Sunny. Highs in the mid 70s. Northeast Winds 5 to 10 Mph.

Tonight 18 May Johnson

Mostly clear early this Evening, then mostly cloudy with a chance of Showers. Lows in the upper 40s. East Winds 10 to 15 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tiffin Temperature Statistics

May Temperature

Iowa City Municipal Airport (7.5 miles)

  • Lowest 4 May, 2025

    40.6 °F

  • Average May

    63.8 °F

  • Highest 15 May, 2025

    91.7 °F

Climate (2020–Present)

Iowa City Municipal Airport (7.5 miles)

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  • Average Low 2020–2025

    42.3 °F

  • Average 2020–2025

    52.4 °F

  • Average High 2020–2025

    62.5 °F
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