Square Lake Weather Forecast

    • 49
    • 72

    Chance Rain Showers

    • 38
    • 55

    Mostly Sunny

    • 34
    • 55

    Mostly Sunny

    • 45
    • 62

    Partly Sunny

    • 55
    • 69

    Partly Sunny

Today 18 Sep Northwest Aroostook

Mostly sunny. Isolated Showers this afternoon. Highs in the mid 70s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent.

Tonight 18 Sep Northwest Aroostook

Mostly cloudy. Scattered Showers, mainly in the evening. Lows in the mid 40s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Square Lake Temperature Statistics

September Temperature

Frenchville, Northern Aroostook Regional Airport (15.5 miles)

  • Lowest 12 September, 2025

    41 °F

  • Average September

    57.8 °F

  • Highest 2 September, 2025

    77 °F

Climate (2020–Present)

Frenchville, Northern Aroostook Regional Airport (15.5 miles)

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  • Average Low 2020–2025

    34 °F

  • Average 2020–2025

    42.3 °F

  • Average High 2020–2025

    50.6 °F
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