McCartney Lake Weather Forecast

    • 54
    • 83

    Increasing Clouds

    • 60
    • 82

    Mostly Cloudy

    • 56
    • 81

    Mostly Cloudy

    • 57
    • 80

    Partly Sunny

    • 56
    • 84

    Mostly Sunny

    • 54
    • 83

    Mostly Sunny

    • 58
    • 84

    Mostly Sunny

Today 28 May Grant

Mostly sunny. Near steady temperature in the lower 80s. East Winds 5 to 10 Mph.

Tonight 28 May Grant

Partly cloudy. Lows in the lower 50s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

McCartney Lake Temperature Statistics

May Temperature

Dubuque Regional Airport (21.1 miles)

  • Lowest 2 May, 2026

    32 °F

  • Average May

    58.8 °F

  • Highest 26 May, 2026

    84.9 °F

Climate (2021–Present)

Dubuque Regional Airport (21.1 miles)

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  • Average Low 2021–2026

    40.6 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    59.4 °F
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