Grand Isle Weather Forecast

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    • 73

    Chance Rain

    • 46
    • 56

    Rain

    • 52
    • 76

    Rain Showers

    • 43
    • 65

    Chance Rain Showers

    • 41
    • 57

    Chance Rain Showers

    • 40
    • 58

    Chance Rain Showers

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    • 59

    Chance Rain Showers

Today 24 May Northwest Aroostook

Partly sunny. Highs in the lower 70s. Temperature falling into the mid 60s late. South Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 24 May Northwest Aroostook

Mostly cloudy. A slight chance of rain after midnight. Lows in the lower 40s. South Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand Isle Temperature Statistics

May Temperature

Frenchville, Northern Aroostook Regional Airport (7.5 miles)

  • Lowest 4 May, 2026

    30.7 °F

  • Average May

    48.6 °F

  • Highest 20 May, 2026

    81.6 °F

Climate (2021–Present)

Frenchville, Northern Aroostook Regional Airport (7.5 miles)

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  • Average Low 2021–2026

    33.5 °F

  • Average 2021–2026

    41.8 °F

  • Average High 2021–2026

    50.2 °F
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