Waterloo Weather Forecast

    • 69
    • 85

    Rain Showers Likely

    • 67
    • 86

    Chance Thunderstorms

    • 71
    • 87

    Slight Chance Thunderstorms

    • 73
    • 90

    Chance Rain Showers

    • 69
    • 88

    Rain Showers Likely

    • 67
    • 83

    Rain Showers Likely

Today 7 Aug Johnson

Partly cloudy with a chance of Thunderstorms. A chance of Showers Early, then Showers likely late. Highs in the mid 80s. South Winds 5 to 10 Mph. Chance of rain 60 percent.

Tonight 7 Aug Johnson

Partly cloudy. A chance of Showers and Thunderstorms through the late overnight. Humid with Lows around 70. Southwest Winds around 5 Mph. Chance of rain 30 percent.

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Waterloo Temperature Statistics

August Temperature

Indianapolis International Airport (11.8 miles)

  • Lowest 3 August, 2026

    64.7 °F

  • Average August

    75 °F

  • Highest 4 August, 2026

    85.6 °F

Climate (2021–2026)

Indianapolis International Airport (11.8 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    55.8 °F

  • Average High 2021–2026

    65.2 °F
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