Henderson Weather Forecast

    • 19
    • 43

    Becoming Sunny

    • 27
    • 35

    Partly Sunny

    • 36
    • 44

    Mostly Cloudy

    • 32
    • 49

    Mostly Cloudy

    • 46
    • 54

    Chance Rain

    • 39
    • 61

    Mostly Cloudy

    • 33
    • 50

    Mostly Cloudy

Today 20 Dec Knox

Mostly sunny. Not as cool with Highs in the lower 40s. Temperature falling into the mid 30s late. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 20 Dec Knox

Mostly clear. Lows around 19. Northwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Henderson Temperature Statistics

December Temperature

Galesburg Municipal Airport (7.5 miles)

  • Lowest 14 December, 2025

    -12.5 °F

  • Average December

    21.7 °F

  • Highest 18 December, 2025

    43.5 °F

Climate (2020–Present)

Galesburg Municipal Airport (7.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    41.3 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    61.7 °F
Get WillyWeather+ to remove ads