Knox Weather Forecast

    • 26
    • 36

    Increasing Clouds

    • 37
    • 44

    Mostly Cloudy

    • 34
    • 49

    Mostly Cloudy

    • 47
    • 55

    Slight Chance Rain

    • 36
    • 60

    Mostly Cloudy

    • 31
    • 46

    Mostly Cloudy

Today 21 Dec Knox

Sunny. Highs in the mid 30s. South Winds around 5 Mph.

Tonight 21 Dec Knox

Partly cloudy in the Evening, then becoming mostly cloudy. Not as cool. Near steady temperature in the upper 20s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Knox Temperature Statistics

December Temperature

Galesburg Municipal Airport (9.3 miles)

  • Lowest 14 December, 2025

    -12.5 °F

  • Average December

    21.5 °F

  • Highest 18 December, 2025

    43.5 °F

Climate (2020–Present)

Galesburg Municipal Airport (9.3 miles)

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  • Average Low 2020–2025

    41.3 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    61.7 °F
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