Isle Au Haut - Old Cove Weather Forecast

    • 56
    • 61

    Increasing Clouds

    • 57
    • 63

    Rain Showers Likely

    • 52
    • 65

    Mostly Sunny

    • 54
    • 60

    Partly Sunny

    • 56
    • 63

    Partly Sunny

    • 55
    • 65

    Slight Chance Rain Showers

Today 12 Sep Knox

Mostly sunny. Highs in the lower 70s. Light and variable Winds, becoming south around 10 Mph this afternoon.

Tonight 12 Sep Knox

Mostly clear in the Evening, then becoming mostly cloudy. Lows in the lower 50s. Light and variable Winds, becoming south around 10 Mph after midnight.

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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 1 September, 2026

    48.9 °F

  • Average September

    62.5 °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

    54.9 °F
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