Sunbeam Weather Forecast

    • 61
    • 84

    Decreasing Clouds

    • 63
    • 83

    Partly Sunny

    • 73
    • 90

    Chance Thunderstorms

    • 62
    • 87

    Partly Sunny

    • 59
    • 82

    Mostly Sunny

    • 62
    • 84

    Slight Chance Thunderstorms

Today 6 Sep Mercer

Partly sunny. Highs in the mid 80s. East Winds 5 to 10 Mph.

Tonight 6 Sep Mercer

Partly cloudy. Lows in the lower 60s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sunbeam Temperature Statistics

September Temperature

Galesburg Municipal Airport (20.5 miles)

  • Lowest 2 September, 2026

    69.1 °F

  • Average September

    81.8 °F

  • Highest 3 September, 2026

    93.6 °F

Climate (2021–2026)

Galesburg Municipal Airport (20.5 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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