Flat Lake Weather Forecast

    • 66
    • 92

    Breezy

    • 57
    • 97

    Rain Showers

    • 53
    • 78

    Slight Chance Rain Showers

    • 59
    • 88

    Rain Showers Likely

    • 53
    • 79

    Chance Thunderstorms

    • 50
    • 72

    Chance Rain Showers

Today 6 Jun McHenry

Sunny, windy. Highs in the lower 90s. South Winds 20 to 30 Mph with Gusts up to 45 Mph.

Tonight 6 Jun McHenry

Partly cloudy. Windy. Lows in the mid 60s. Southeast Winds 20 to 30 Mph with Gusts up to 45 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Flat Lake Temperature Statistics

June Temperature

Harvey Municipal Airport (22.4 miles)

  • Lowest 2 June, 2026

    51.8 °F

  • Average June

    67 °F

  • Highest 2 June, 2026

    87.8 °F

Climate (2021–Present)

Harvey Municipal Airport (22.4 miles)

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  • Average Low 2021–2026

    30.4 °F

  • Average 2021–2026

    41.2 °F

  • Average High 2021–2026

    51.9 °F
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