Sinclair Weather Forecast

    • 49
    • 63

    Mostly Cloudy

    • 53
    • 68

    Mostly Cloudy

    • 56
    • 73

    Rain Showers Likely

    • 48
    • 69

    Chance Rain Showers

    • 53
    • 67

    Rain Showers Likely

    • 53
    • 67

    Chance Rain Showers

Today 26 Oct Grundy

Showers likely. Highs in the mid 60s. Chance of rain 60 percent.

Tonight 26 Oct Grundy

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

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Sinclair Temperature Statistics

October Temperature

Waterloo, Waterloo Municipal Airport (16.8 miles)

  • Lowest 17 October, 2026

    30.7 °F

  • Average October

    60.1 °F

  • Highest 11 October, 2026

    89.7 °F

Climate (2021–2026)

Waterloo, Waterloo Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    40.2 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    61.8 °F
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