Isle Au Haut - Old Cove Weather Forecast

    • 53
    • 63

    Mostly Cloudy

    • 52
    • 61

    Rain Likely

    • 51
    • 59

    Rain

    • 51
    • 58

    Rain

    • 51
    • 59

    Chance Rain Showers

    • 51
    • 59

    Mostly Cloudy

Today 25 Sep Knox

Partly sunny. Highs in the upper 60s. Northeast Winds around 10 Mph with Gusts up to 25 Mph.

Tonight 25 Sep Knox

Cloudy. A slight chance of rain after midnight. Lows in the lower 50s. Northeast Winds 10 to 15 Mph. Chance of rain 20 percent.

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Isle Au Haut - Old Cove Temperature Statistics

September Temperature

Rockland, Knox County Regional Airport (24.2 miles)

  • Lowest 20 September, 2026

    39 °F

  • Average September

    59.8 °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

    39.4 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    54.8 °F
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