Sinclair Weather Forecast

    • 53
    • 75

    Severe Tstms

    • 60
    • 79

    Sunny

    • 51
    • 79

    Rain Showers Likely

    • 53
    • 71

    Mostly Sunny

    • 53
    • 74

    Slight Chance Thunderstorms

    • 57
    • 76

    Partly Sunny

    • 61
    • 79

    Chance Thunderstorms

Today 11 Jun Grundy

Mostly cloudy with a chance of Showers and Thunderstorms. Some Thunderstorms may be severe. Highs in the mid 70s. Temperature falling into the mid 60s late. Northwest Winds 15 to 20 Mph with Gusts up to 40 Mph. Chance of rain 50 percent.

Tonight 11 Jun Grundy

Clear. Lows in the lower 50s. West Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sinclair Temperature Statistics

June Temperature

Waterloo, Waterloo Municipal Airport (16.8 miles)

  • Lowest 2 June, 2026

    53.7 °F

  • Average June

    73.6 °F

  • Highest 6 June, 2026

    87.7 °F

Climate (2021–Present)

Waterloo, Waterloo Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    40.2 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    62 °F
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