Greenbrier Weather Forecast

    • 66
    • 82

    Chance Thunderstorms

    • 66
    • 86

    Rain Showers

    • 61
    • 79

    Rain Showers

    • 59
    • 81

    Slight Chance Thunderstorms

    • 66
    • 79

    Chance Rain Showers

    • 72
    • 89

    Mostly Sunny

Today 16 Jun Waukesha

Partly sunny. Highs in the lower 80s. South Winds 5 to 10 Mph.

Tonight 16 Jun Waukesha

Partly cloudy. A 50 percent chance of light Showers and Thunderstorms after midnight. Lows in the mid 60s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Greenbrier Temperature Statistics

June Temperature

Waukesha County Airport (5.6 miles)

  • Lowest 1 June, 2025

    39.2 °F

  • Average June

    61.6 °F

  • Highest 11 June, 2025

    84.2 °F

Climate (2020–Present)

Waukesha County Airport (5.6 miles)

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  • Average Low 2020–2025

    38.1 °F

  • Average 2020–2025

    45.6 °F

  • Average High 2020–2025

    56.2 °F
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