Isle Au Haut - Old Cove Weather Forecast

    • 51
    • 67

    Becoming Sunny

    • 60
    • 63

    Rain

    • 57
    • 72

    Partly Sunny

    • 54
    • 65

    Mostly Sunny

    • 56
    • 62

    Partly Sunny

    • 57
    • 64

    Slight Chance Rain Showers

Today 8 Sep Knox

Mostly cloudy with a chance of Showers this Morning, then mostly sunny this afternoon. Highs in the mid 70s. North Winds around 10 Mph. Chance of rain 50 percent.

Tonight 8 Sep Knox

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

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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

    61.6 °F

  • Highest 4 September, 2026

    73 °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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