Grand Isle Weather Forecast

    • 54
    • 73

    Rain Likely

    • 53
    • 75

    Mostly Cloudy

    • 59
    • 80

    Chance Rain Showers

    • 57
    • 79

    Rain Showers Likely

    • 54
    • 74

    Rain Showers Likely

    • 57
    • 76

    Slight Chance Rain Showers

Today 30 Jul Northwest Aroostook

Mostly cloudy. Patchy fog in the morning. A chance of rain in the Morning, then rain likely in the afternoon. Highs in the upper 60s. East Winds around 5 Mph. Chance of rain 70 percent.

Tonight 30 Jul Northwest Aroostook

Cloudy. Patchy fog. Near steady temperature in the upper 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grand Isle Temperature Statistics

July Temperature

Frenchville, Northern Aroostook Regional Airport (7.5 miles)

  • Lowest 6 July, 2026

    48.7 °F

  • Average July

    67.1 °F

  • Highest 1 July, 2026

    89.7 °F

Climate (2021–2026)

Frenchville, Northern Aroostook Regional Airport (7.5 miles)

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  • Average Low 2021–2026

    33.6 °F

  • Average 2021–2026

    41.9 °F

  • Average High 2021–2026

    50.2 °F
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