Friess Lake Weather Forecast

    • 71
    • 88

    Mostly Cloudy

    • 68
    • 88

    Partly Sunny

    • 68
    • 84

    Rain Showers Likely

    • 67
    • 83

    Chance Thunderstorms

    • 65
    • 82

    Slight Chance Rain Showers

    • 62
    • 80

    Partly Sunny

Today 1 Sep Washington

Warm and humid. Partly sunny. Patchy fog in the morning. Highs in the upper 80s. Southwest Winds up to 10 Mph. Highest heat index Readings 95 to 97 in the afternoon.

Tonight 1 Sep Washington

Partly cloudy. A 20 percent chance of light Showers and Thunderstorms early in the morning. Lows in the lower 70s. Southwest Winds up to 5 Mph.

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Friess Lake Temperature Statistics

September Temperature

Waukesha County Airport (13.7 miles)

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  • Average September

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Climate (2021–2026)

Waukesha County Airport (13.7 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    46.2 °F

  • Average High 2021–2026

    56.6 °F
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