Isle Au Haut - Merchants Cove Weather Forecast

    • 54
    • 63

    Patchy Fog

    • 58
    • 64

    Mostly Cloudy

    • 54
    • 66

    Chance Rain Showers

    • 48
    • 63

    Mostly Sunny

    • 50
    • 59

    Chance Rain Showers

    • 45
    • 59

    Slight Chance Rain Showers

Today 30 Sep Knox

Mostly cloudy. Highs in the upper 60s. Light and variable Winds.

Tonight 30 Sep Knox

Mostly cloudy. Patchy fog. Lows in the lower 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Isle Au Haut - Merchants Cove Temperature Statistics

September Temperature

Rockland, Knox County Regional Airport (23.6 miles)

  • Lowest 24 September, 2026

    37 °F

  • Average September

    59.4 °F

  • Highest 10 September, 2026

    84 °F

Climate (2021–2026)

Rockland, Knox County Regional Airport (23.6 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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