McCartney Lake Weather Forecast

    • 65
    • 79

    Slight Chance Thunderstorms

    • 56
    • 79

    Partly Sunny

    • 55
    • 73

    Rain Showers Likely

    • 62
    • 78

    Rain Showers

    • 55
    • 73

    Chance Rain Showers

    • 57
    • 69

    Chance Rain Showers

Today 11 Sep Grant

Patchy fog in the morning. Mostly sunny. Highs around 80. South Winds 5 to 10 Mph.

Tonight 11 Sep Grant

Clear. Near steady temperature in the upper 50s. Southeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

McCartney Lake Temperature Statistics

September Temperature

Dubuque Regional Airport (21.1 miles)

  • Lowest 7 September, 2026

    61.6 °F

  • Average September

    77.5 °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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