Flat Lake Weather Forecast

    • 28
    • 46

    Partly Sunny

    • 27
    • 42

    Partly Sunny

    • 24
    • 46

    Mostly Cloudy

    • 24
    • 43

    Partly Sunny

    • 21
    • 36

    Snow Likely

    • 11
    • 29

    Chance Snow

Today 13 Feb McHenry

Mostly sunny. Highs in the mid 40s. Southwest Winds around 5 Mph.

Tonight 13 Feb McHenry

Partly cloudy. Lows in the mid 20s. Southwest Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Flat Lake Temperature Statistics

February Temperature

Harvey Municipal Airport (22.4 miles)

  • Lowest 2 February, 2026

    8.6 °F

  • Average February

    28.2 °F

  • Highest 5 February, 2026

    46.4 °F

Climate (2021–Present)

Harvey Municipal Airport (22.4 miles)

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

  • Average Low 2021–2026

    30.3 °F

  • Average 2021–2026

    41.3 °F

  • Average High 2021–2026

    52 °F
Get WillyWeather+ to remove ads