Ontario Weather Forecast

    • 45
    • 65

    Increasing Clouds

    • 49
    • 74

    Mostly Cloudy

    • 22
    • 51

    Rain

    • 24
    • 41

    Mostly Sunny

    • 38
    • 58

    Partly Sunny

    • 31
    • 61

    Mostly Cloudy

Today 13 Mar Vernon

Mostly sunny. Highs in the mid 60s. Southeast Winds 5 to 10 Mph.

Tonight 13 Mar Vernon

Partly cloudy. Not as cool with Lows in the mid 40s. Southeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ontario Temperature Statistics

March Temperature

Sparta, Sparta / Fort McCoy Airport (17.4 miles)

  • Lowest 2 March, 2025

    0.1 °F

  • Average March

    34.4 °F

  • Highest 10 March, 2025

    70 °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 °F

  • Average High 2020–2025

    57.6 °F
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