Isle Au Haut - Old Cove Weather Forecast

    • 55
    • 71

    Partly Sunny

    • 54
    • 66

    Sunny

    • 57
    • 63

    Mostly Sunny

    • 58
    • 64

    Chance Rain Showers

    • 54
    • 68

    Mostly Sunny

    • 58
    • 63

    Slight Chance Rain Showers

Today 10 Sep Knox

Partly sunny. A chance of Showers in the morning. Warmer with Highs in the lower 80s. West Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain 50 percent.

Tonight 10 Sep Knox

Partly cloudy. Less humid with Lows in the lower 50s. Northwest Winds 10 to 15 Mph. Gusts up to 30 Mph in the evening.

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  • Temperature Real-Time

Isle Au Haut - Old Cove Temperature Statistics

September Temperature

Rockland, Knox County Regional Airport (24.2 miles)

  • Lowest 1 September, 2026

    48.9 °F

  • Average September

    61.9 °F

  • Highest 7 September, 2026

    78.1 °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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