Ontario Weather Forecast

    • 38
    • 61

    Increasing Clouds

    • 50
    • 64

    Mostly Cloudy

    • 49
    • 76

    Rain Showers

    • 35
    • 61

    Slight Chance Rain Showers

    • 42
    • 64

    Partly Sunny

    • 42
    • 64

    Chance Rain Showers

Today 26 Apr Vernon

Clear. Highs in the lower 60s. Northeast Winds around 5 Mph.

Tonight 26 Apr Vernon

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the upper 30s. Light Winds.

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  • Temperature Real-Time

Ontario Temperature Statistics

April Temperature

Sparta, Sparta / Fort McCoy Airport (17.4 miles)

  • Lowest 8 April, 2025

    9.5 °F

  • Average April

    43.4 °F

  • Highest 23 April, 2025

    75.4 °F

Climate (2020–Present)

Sparta, Sparta / Fort McCoy Airport (17.4 miles)

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  • Average Low 2020–2025

    34.2 °F

  • Average 2020–2025

    47.1 °F

  • Average High 2020–2025

    57.8 °F
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