Fresh Water Lake Weather Forecast

    • 47
    • 68

    Mostly Cloudy

    • 44
    • 64

    Mostly Cloudy

    • 44
    • 69

    Mostly Sunny

    • 50
    • 69

    Mostly Cloudy

    • 53
    • 71

    Partly Sunny

    • 54
    • 74

    Partly Sunny

    • 56
    • 76

    Partly Sunny

Today 19 Sep McHenry

Mostly cloudy. Highs in the upper 60s. Northeast Winds around 15 Mph.

Tonight 19 Sep McHenry

Mostly cloudy. Lows in the upper 40s. Northeast Winds 5 to 10 Mph.

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  • Temperature Real-Time

Fresh Water Lake Temperature Statistics

September Temperature

RUGBY (18.6 miles)

  • Lowest 13 September, 2026

    35.6 °F

  • Average September

    61.2 °F

  • Highest 5 September, 2026

    84.2 °F

Climate (2021–2026)

RUGBY (18.6 miles)

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  • Average Low 2021–2026

    27 °F

  • Average 2021–2026

    37.6 °F

  • Average High 2021–2026

    47.9 °F
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