McCartney Lake Weather Forecast

    • 53
    • 66

    Mostly Cloudy

    • 55
    • 64

    Chance Rain Showers

    • 56
    • 64

    Mostly Cloudy

    • 56
    • 68

    Mostly Cloudy

    • 59
    • 67

    Rain Showers

    • 57
    • 67

    Chance Rain Showers

Today 25 Sep Grant

Patchy fog in the morning. Mostly cloudy. Highs in the upper 60s. East Winds 5 to 10 Mph.

Tonight 25 Sep Grant

Partly cloudy. Lows in the lower 50s. East 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 14 September, 2026

    48.7 °F

  • Average September

    69.1 °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

    59.4 °F
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