McCartney Lake Weather Forecast

    • 63
    • 75

    Rain Showers

    • 62
    • 77

    Rain Showers Likely

    • 59
    • 79

    Mostly Sunny

    • 62
    • 81

    Mostly Sunny

    • 66
    • 84

    Chance Rain Showers

    • 63
    • 81

    Slight Chance Thunderstorms

Today 31 Jul Grant

Showers. A slight chance of Thunderstorms in the Morning, then a chance of Thunderstorms in the afternoon. Cooler with Highs in the lower 70s. Southeast Winds 10 to 15 Mph. Chance of rain 90 percent.

Tonight 31 Jul Grant

Showers with a chance of Thunderstorms. Humid with Lows in the lower 60s. Northeast Winds 10 to 20 Mph. Gusts up to 30 Mph after midnight. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

McCartney Lake Temperature Statistics

July Temperature

Dubuque Regional Airport (21.1 miles)

  • Lowest 23 July, 2026

    52 °F

  • Average July

    75.6 °F

  • Highest 27 July, 2026

    93 °F

Climate (2021–2026)

Dubuque Regional Airport (21.1 miles)

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  • Average Low 2021–2026

    40.6 °F

  • Average 2021–2026

    50.1 °F

  • Average High 2021–2026

    59.5 °F
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