Sunnyside Weather Forecast

    • 38
    • 57

    Decreasing Clouds

    • 40
    • 59

    Partly Sunny

    • 41
    • 60

    Partly Sunny

    • 42
    • 61

    Mostly Cloudy

    • 46
    • 63

    Chance Rain Showers

    • 48
    • 61

    Chance Rain Showers

    • 49
    • 68

    Partly Sunny

Today 22 May Waukesha

Mostly cloudy with a 20 percent chance of light rain Showers. Near steady temperature in the mid 50s. North Winds 10 to 15 Mph.

Tonight 22 May Waukesha

Partly cloudy. Lows in the upper 30s. Northwest Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sunnyside Temperature Statistics

May Temperature

Waukesha County Airport (5.6 miles)

  • Lowest 4 May, 2025

    35.6 °F

  • Average May

    53.3 °F

  • Highest 15 May, 2025

    82.4 °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

    56.3 °F
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