Ontario Weather Forecast

    • 70
    • 87

    Becoming Sunny

    • 64
    • 86

    Rain Showers

    • 57
    • 74

    Rain Showers

    • 48
    • 70

    Rain Showers

    • 36
    • 58

    Breezy

    • 38
    • 58

    Sunny

Today 12 Oct Knox

Mostly sunny. Highs in the upper 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 12 Oct Knox

Mostly clear. Not as cool with Lows in the lower 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

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Ontario Temperature Statistics

October Temperature

Galesburg Municipal Airport (11.8 miles)

  • Lowest 5 October, 2026

    41 °F

  • Average October

    61.4 °F

  • Highest 10 October, 2026

    81.7 °F

Climate (2021–2026)

Galesburg Municipal Airport (11.8 miles)

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  • Average Low 2021–2026

    41.8 °F

  • Average 2021–2026

    52.1 °F

  • Average High 2021–2026

    62.5 °F
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