McCartney Lake Weather Forecast

    • 50
    • 71

    Becoming Sunny

    • 59
    • 73

    Mostly Sunny

    • 55
    • 78

    Rain Showers

    • 44
    • 66

    Slight Chance Rain Showers

    • 44
    • 64

    Partly Sunny

    • 47
    • 63

    Chance Rain Showers

Today 21 Apr Grant

Mostly sunny. Much warmer with Highs in the mid 70s. West Winds 5 to 10 Mph.

Tonight 21 Apr Grant

Mostly clear. Lows in the upper 40s. North Winds around 5 Mph, becoming northeast after midnight.

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  • Temperature Real-Time

McCartney Lake Temperature Statistics

April Temperature

Dubuque Regional Airport (21.1 miles)

  • Lowest 7 April, 2026

    26.1 °F

  • Average April

    48.8 °F

  • Highest 17 April, 2026

    79 °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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