Isle Au Haut - Old Cove Weather Forecast

    • 58
    • 62

    Rain Showers

    • 53
    • 63

    Chance Rain Showers

    • 55
    • 60

    Mostly Sunny

    • 54
    • 61

    Partly Sunny

    • 54
    • 62

    Chance Rain Showers

    • 51
    • 65

    Slight Chance Rain Showers

Today 13 Sep Knox

Showers. Patchy fog. Highs in the mid 60s. South Winds around 10 Mph with Gusts up to 25 Mph. Chance of rain 90 percent.

Tonight 13 Sep Knox

Cloudy with a 40 percent chance of Showers. Lows in the upper 50s. 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

    62.6 °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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