Ontario Weather Forecast

    • 49
    • 65

    Rain Showers Likely

    • 44
    • 67

    Chance Rain Showers

    • 44
    • 65

    Mostly Sunny

    • 49
    • 71

    Slight Chance Rain Showers

    • 50
    • 74

    Mostly Sunny

    • 55
    • 77

    Partly Sunny

Today 1 May Knox

Showers likely with a chance of Thunderstorms. Highs in the mid 60s. West Winds 5 to 10 Mph. Chance of rain 60 percent.

Tonight 1 May Knox

Showers with a chance of Thunderstorms. Near steady temperature in the mid 50s. East Winds 5 to 10 Mph. Chance of rain 90 percent.

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Ontario Temperature Statistics

May Temperature

Galesburg Municipal Airport (11.8 miles)

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  • Average May

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Climate (2020–Present)

Galesburg Municipal Airport (11.8 miles)

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  • Average Low 2020–2025

    41.1 °F

  • Average 2020–2025

    51.3 °F

  • Average High 2020–2025

    61.5 °F
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