Bertom Lake Weather Forecast

    • 64
    • 84

    Increasing Clouds

    • 68
    • 85

    Chance Thunderstorms

    • 67
    • 86

    Rain Showers

    • 62
    • 82

    Mostly Sunny

    • 65
    • 84

    Mostly Sunny

    • 67
    • 85

    Slight Chance Thunderstorms

Today 9 Jul Grant

Mostly sunny. Near steady temperature in the lower 80s. Light Winds.

Tonight 9 Jul Grant

Partly cloudy. Lows in the mid 60s. Northeast Winds around 5 Mph, becoming southeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Bertom Lake Temperature Statistics

July Temperature

Dubuque Regional Airport (23 miles)

  • Lowest 2 July, 2025

    62.1 °F
  • Average July

    76.1 °F
  • Highest 4 July, 2025

    90 °F

Climate (2020–Present)

Dubuque Regional Airport (23 miles)

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  • Average Low 2020–2025

    40.2 °F
  • Average 2020–2025

    49.6 °F
  • Average High 2020–2025

    58.9 °F
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