McCartney Lake Weather Forecast

    • 58
    • 78

    Increasing Clouds

    • 56
    • 76

    Partly Sunny

    • 65
    • 80

    Mostly Cloudy

    • 75
    • 88

    Mostly Sunny

    • 76
    • 93

    Partly Sunny

    • 74
    • 94

    Chance Thunderstorms

    • 73
    • 93

    Slight Chance Thunderstorms

Today 25 Jun Grant

Mostly sunny. Highs in the upper 70s. Northwest Winds 5 to 10 Mph.

Tonight 25 Jun Grant

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the upper 50s. North Winds around 5 Mph, becoming east after midnight.

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  • Temperature Real-Time

McCartney Lake Temperature Statistics

June Temperature

Dubuque Regional Airport (21.1 miles)

  • Lowest 15 June, 2026

    48.9 °F

  • Average June

    68.3 °F

  • Highest 6 June, 2026

    87.1 °F

Climate (2021–2026)

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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