Bertom Lake Weather Forecast

    • 52
    • 61

    Rain Showers Likely

    • 60
    • 72

    Slight Chance Rain Showers

    • 55
    • 77

    Mostly Cloudy

    • 44
    • 70

    Chance Rain Showers

    • 42
    • 60

    Mostly Sunny

    • 46
    • 66

    Mostly Sunny

Today 15 Oct Grant

Cloudy. Showers likely this Morning, then a chance of Showers this afternoon. Highs around 60. East Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 15 Oct Grant

Mostly cloudy with a 20 percent chance of Showers. Lows in the lower 50s. East Winds 5 to 10 Mph.

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Bertom Lake Temperature Statistics

October Temperature

Dubuque Regional Airport (23 miles)

  • Lowest 8 October, 2025

    42.1 °F

  • Average October

    63 °F

  • Highest 3 October, 2025

    87.1 °F

Climate (2020–Present)

Dubuque Regional Airport (23 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    49.8 °F

  • Average High 2020–2025

    59.1 °F
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