Plymouth Weather Forecast

    • 46
    • 58

    Rain Showers

    • 41
    • 64

    Partly Sunny

    • 39
    • 64

    Partly Sunny

    • 40
    • 65

    Mostly Sunny

    • 41
    • 68

    Mostly Cloudy

    • 45
    • 67

    Chance Rain Showers

    • 45
    • 66

    Slight Chance Rain Showers

Today 20 Sep Southern Penobscot

Cloudy with a 50 percent chance of rain. Highs in the upper 50s. South Winds 5 to 10 Mph with Gusts up to 25 Mph.

Tonight 20 Sep Southern Penobscot

Cloudy. A chance of rain in the evening. Patchy fog after midnight. Lows in the mid 40s. South Winds 5 to 10 Mph, becoming northwest after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Plymouth Temperature Statistics

September Temperature

Bangor, Bangor International Airport (19.3 miles)

  • Lowest 15 September, 2026

    39.7 °F

  • Average September

    61.8 °F

  • Highest 10 September, 2026

    82.7 °F

Climate (2021–2026)

Bangor, Bangor International Airport (19.3 miles)

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  • Average Low 2021–2026

    37.2 °F

  • Average 2021–2026

    47.2 °F

  • Average High 2021–2026

    56.9 °F
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