Sunbeam Weather Forecast

    • 77
    • 93

    Decreasing Clouds

    • 73
    • 95

    Mostly Sunny

    • 65
    • 88

    Mostly Sunny

    • 64
    • 87

    Mostly Sunny

    • 67
    • 87

    Slight Chance Thunderstorms

    • 66
    • 84

    Slight Chance Thunderstorms

Today 26 Jul Mercer

Areas of fog early this morning. Mostly cloudy with a slight chance of Showers and Thunderstorms early this Morning, then mostly sunny this afternoon. Hot with Highs in the lower 90s. South Winds around 5 Mph, becoming southwest this afternoon. Chance of rain 20 percent. Heat index Values up to 111.

Tonight 26 Jul Mercer

Partly cloudy in the Evening, then becoming mostly clear. Humid with Lows in the upper 70s. Southwest Winds 5 to 10 Mph. Heat index Values up to 110 early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sunbeam Temperature Statistics

July Temperature

Galesburg Municipal Airport (20.5 miles)

  • Lowest 23 July, 2026

    53.6 °F

  • Average July

    75.4 °F

  • Highest 18 July, 2026

    91.8 °F

Climate (2021–2026)

Galesburg Municipal Airport (20.5 miles)

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  • Average Low 2021–2026

    41.7 °F

  • Average 2021–2026

    52.1 °F

  • Average High 2021–2026

    62.5 °F
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