Grassy Island Weather Forecast

    • 73
    • 89

    Chance Thunderstorms

    • 67
    • 84

    Chance Thunderstorms

    • 68
    • 82

    Chance Rain Showers

    • 67
    • 79

    Chance Thunderstorms

    • 65
    • 77

    Slight Chance Thunderstorms

    • 65
    • 81

    Mostly Sunny

Today 16 Aug Wayne

Partly cloudy. A chance of Showers and Thunderstorms in the afternoon. Highs around 90. Southwest Winds up to 10 Mph. Chance of rain 50 percent. Heat index Readings in the mid 90s.

Tonight 16 Aug Wayne

Partly cloudy with a chance of Showers in the Evening, then mostly cloudy with a chance of Showers after midnight. Lows in the lower 70s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Grassy Island Temperature Statistics

August Temperature

Detroit/Grosse Ile, Grosse Ile Airport (8.7 miles)

  • Lowest 2 August, 2025

    55.4 °F

  • Average August

    74.7 °F

  • Highest 11 August, 2025

    86 °F

Climate (2020–Present)

Detroit/Grosse Ile, Grosse Ile Airport (8.7 miles)

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

  • Average Low 2020–2025

    44.4 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    59 °F
Get WillyWeather+ to remove ads