Friess Lake Weather Forecast

    • 71
    • 88

    Mostly Cloudy

    • 68
    • 88

    Chance Thunderstorms

    • 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. Patchy fog early in the morning. Near steady temperature around 70. Calm Winds.

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Friess Lake Temperature Statistics

September Temperature

Waukesha County Airport (13.7 miles)

  • Lowest

  • Average September

  • Highest

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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