Sinclair Weather Forecast

    • 31
    • 55

    Sunny

    • 31
    • 56

    Sunny

    • 38
    • 59

    Partly Sunny

    • 44
    • 60

    Mostly Cloudy

    • 45
    • 61

    Chance Rain Showers

    • 43
    • 58

    Chance Rain Showers

    • 38
    • 57

    Chance Rain Showers

Today 22 Oct Grundy

Sunny. Highs in the mid 50s. Northwest Winds 15 to 20 Mph.

Tonight 22 Oct Grundy

Clear. Widespread frost after midnight. Lows in the lower 30s. Northwest Winds around 15 Mph with Gusts up to 25 Mph, Diminishing to 5 to 10 Mph.

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Sinclair Temperature Statistics

October Temperature

Waterloo, Waterloo Municipal Airport (16.8 miles)

  • Lowest 19 October, 2025

    37.9 °F

  • Average October

    61.5 °F

  • Highest 3 October, 2025

    89.1 °F

Climate (2020–Present)

Waterloo, Waterloo Municipal Airport (16.8 miles)

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  • Average Low 2020–2025

    40.2 °F

  • Average 2020–2025

    51.1 °F

  • Average High 2020–2025

    61.7 °F
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