McCartney Lake Weather Forecast

    • 61
    • 70

    Rain Showers

    • 59
    • 74

    Rain Showers

    • 56
    • 65

    Rain Showers Likely

    • 52
    • 62

    Chance Rain Showers

    • 49
    • 62

    Partly Sunny

    • 53
    • 67

    Partly Sunny

Today 18 Sep Grant

Cloudy. Patchy fog in the morning. A chance of Showers in the Morning, then Showers likely with a slight chance of Thunderstorms in the afternoon. Highs in the upper 60s. East Winds 10 to 15 Mph. Chance of rain 70 percent.

Tonight 18 Sep Grant

A chance of Thunderstorms. A chance of Showers in the Evening, then Showers after midnight. Some Thunderstorms may produce heavy rainfall. Locally heavy rainfall possible after midnight. Lows around 60. East Winds 10 to 15 Mph. Chance of rain 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

McCartney Lake Temperature Statistics

September Temperature

Dubuque Regional Airport (21.1 miles)

  • Lowest 14 September, 2026

    48.9 °F

  • Average September

    72.4 °F

  • Highest 1 September, 2026

    91.7 °F

Climate (2021–2026)

Dubuque Regional Airport (21.1 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    50.1 °F

  • Average High 2021–2026

    59.5 °F
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