Isle Au Haut - Old Cove Weather Forecast

    • 53
    • 59

    Increasing Clouds

    • 53
    • 59

    Chance Rain

    • 49
    • 61

    Partly Sunny

    • 49
    • 59

    Partly Sunny

    • 50
    • 58

    Partly Sunny

    • 50
    • 58

    Chance Rain Showers

Today 19 Sep Knox

Sunny. Highs in the mid 60s. North Winds around 10 Mph in the Morning, becoming light and variable.

Tonight 19 Sep Knox

Mostly clear in the Evening, then becoming partly cloudy. Lows in the mid 40s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Isle Au Haut - Old Cove Temperature Statistics

September Temperature

Rockland, Knox County Regional Airport (24.2 miles)

  • Lowest 12 September, 2026

    44.1 °F

  • Average September

    61.4 °F

  • Highest 10 September, 2026

    84 °F

Climate (2021–2026)

Rockland, Knox County Regional Airport (24.2 miles)

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  • Average Low 2021–2026

    39.5 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    54.8 °F
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