Sinclair Weather Forecast

    • 57
    • 81

    Sunny

    • 65
    • 79

    Chance Rain Showers

    • 54
    • 76

    Partly Sunny

    • 56
    • 70

    Rain Showers Likely

    • 60
    • 79

    Rain Showers

    • 53
    • 69

    Chance Rain Showers

    • 55
    • 67

    Chance Rain Showers

Today 10 Sep Grundy

Sunny. Near steady temperature in the upper 70s. North Winds around 5 Mph.

Tonight 10 Sep Grundy

Clear. Lows in the mid 50s. Southeast Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Sinclair Temperature Statistics

September Temperature

Waterloo, Waterloo Municipal Airport (16.8 miles)

  • Lowest 8 September, 2026

    64.9 °F

  • Average September

    77.2 °F

  • Highest 1 September, 2026

    92.6 °F

Climate (2021–2026)

Waterloo, Waterloo Municipal Airport (16.8 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    40.2 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    61.9 °F
Get WillyWeather+ to remove ads