O'Leary's Lake Recreation Area Weather Forecast

    • 62
    • 82

    Increasing Clouds

    • 68
    • 79

    Chance Rain Showers

    • 72
    • 86

    Chance Thunderstorms

    • 71
    • 87

    Chance Thunderstorms

    • 70
    • 86

    Chance Rain Showers

    • 69
    • 86

    Chance Rain Showers

Today 28 Aug Grant

Patchy dense fog in the morning. Mostly sunny. Highs in the lower 80s. West Winds around 5 Mph.

Tonight 28 Aug Grant

Mostly clear. Patchy fog. Lows in the upper 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

O'Leary's Lake Recreation Area Temperature Statistics

August Temperature

Dubuque Regional Airport (10.6 miles)

  • Lowest 24 August, 2026

    53.1 °F

  • Average August

    70.5 °F

  • Highest 10 August, 2026

    84 °F

Climate (2021–2026)

Dubuque Regional Airport (10.6 miles)

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  • Average Low 2021–2026

    40.6 °F

  • Average 2021–2026

    50.1 °F

  • Average High 2021–2026

    59.4 °F
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