Galesburg Weather Forecast

    • 63
    • 82

    Chance Thunderstorms

    • 59
    • 79

    Chance Rain Showers

    • 61
    • 83

    Chance Thunderstorms

    • 61
    • 83

    Chance Thunderstorms

    • 58
    • 83

    Chance Rain Showers

    • 55
    • 78

    Slight Chance Thunderstorms

Today 18 Sep Jasper

Partly sunny with a chance of Showers. A slight chance of Thunderstorms in the Morning, then a chance of Thunderstorms in the afternoon. Highs in the mid 80s. South Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 18 Sep Jasper

Mostly cloudy with a chance of Thunderstorms. A chance of Showers in the Evening, then Showers likely after midnight. Humid with Lows in the lower 60s. South Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Galesburg Temperature Statistics

September Temperature

Newton Municipal Airport - Earl Johnson Field (8.1 miles)

  • Lowest 4 September, 2025

    42.8 °F

  • Average September

    67.1 °F

  • Highest 13 September, 2025

    96.8 °F

Climate (2020–Present)

Newton Municipal Airport - Earl Johnson Field (8.1 miles)

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  • Average Low 2020–2025

    41.3 °F

  • Average 2020–2025

    51.1 °F

  • Average High 2020–2025

    61 °F
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