Bertom Lake Weather Forecast

    • 61
    • 83

    Chance Rain Showers

    • 64
    • 80

    Chance Rain Showers

    • 69
    • 87

    Partly Sunny

Today 6 Sep Grant

Areas of fog in the morning. Partly sunny. Highs in the lower 80s. East Winds 5 to 10 Mph.

Tonight 6 Sep Grant

Partly cloudy. Patchy fog. Lows in the lower 60s. Light Winds.

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Bertom Lake Temperature Statistics

September Temperature

Dubuque Regional Airport (23 miles)

  • Lowest 1 September, 2026

    69.7 °F

  • Average September

    80.5 °F

  • Highest 1 September, 2026

    91.7 °F

Climate (2021–2026)

Dubuque Regional Airport (23 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    50.1 °F

  • Average High 2021–2026

    59.5 °F
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