Ontario Weather Forecast

    • 26
    • 49

    Mostly Sunny

    • 35
    • 55

    Chance Rain Showers

    • 38
    • 51

    Rain Showers

    • 36
    • 61

    Rain Showers

    • 33
    • 51

    Partly Sunny

    • 35
    • 60

    Partly Sunny

    • 43
    • 63

    Partly Sunny

Today 3 Mar Vernon

Partly sunny. Highs in the upper 40s. Light and variable Winds.

Tonight 3 Mar Vernon

Clear this Evening, then becoming partly cloudy. Patchy fog after midnight. Lows in the mid 20s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ontario Temperature Statistics

March Temperature

Sparta, Sparta / Fort McCoy Airport (17.4 miles)

  • Lowest 1 March, 2026

    11.3 °F

  • Average March

    20.5 °F

  • Highest 1 March, 2026

    30.9 °F

Climate (2021–Present)

Sparta, Sparta / Fort McCoy Airport (17.4 miles)

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  • Average Low 2021–2026

    34.9 °F

  • Average 2021–2026

    47.5 °F

  • Average High 2021–2026

    58.2 °F
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