Ontario Weather Forecast

    • 43
    • 62

    Rain Showers Likely

    • 36
    • 58

    Chance Rain Showers

    • 40
    • 64

    Mostly Sunny

    • 46
    • 73

    Slight Chance Rain Showers

    • 48
    • 73

    Partly Sunny

    • 50
    • 77

    Slight Chance Rain Showers

Today 1 May Vernon

Cloudy. Showers likely in the Morning, then a chance of Showers in the afternoon. Highs in the lower 60s. Northeast Winds around 5 Mph. Chance of rain 70 percent.

Tonight 1 May Vernon

Mostly cloudy. A chance of Showers in the Evening, then Showers likely after midnight. Lows in the mid 40s. North Winds around 5 Mph, becoming light Winds after midnight. Chance of rain 60 percent.

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Ontario Temperature Statistics

May Temperature

Sparta, Sparta / Fort McCoy Airport (17.4 miles)

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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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