Henderson Weather Forecast

    • 50
    • 69

    Mostly Cloudy

    • 54
    • 70

    Chance Rain Showers

    • 55
    • 77

    Chance Rain Showers

    • 56
    • 79

    Slight Chance Thunderstorms

    • 59
    • 83

    Partly Sunny

    • 62
    • 84

    Chance Thunderstorms

Today 21 May Knox

Partly sunny. Near steady temperature in the upper 60s. East Winds 10 to 15 Mph.

Tonight 21 May Knox

Mostly cloudy. Lows around 50. East Winds around 10 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Henderson Temperature Statistics

May Temperature

Galesburg Municipal Airport (7.5 miles)

  • Lowest 7 May, 2026

    32.7 °F

  • Average May

    58.8 °F

  • Highest 17 May, 2026

    84.4 °F

Climate (2021–Present)

Galesburg Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    41.7 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    62.4 °F
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