Back River Mouth Weather Forecast

    • 63
    • 66

    Rain Showers Likely

    • 62
    • 69

    Chance Rain Showers

    • 56
    • 70

    Mostly Sunny

    • 54
    • 60

    Mostly Sunny

    • 56
    • 64

    Partly Sunny

    • 60
    • 69

    Partly Sunny

    • 63
    • 72

    Partly Sunny

Today 17 Sep Eastern Plymouth

Mostly sunny. Near steady temperature in the upper 60s. Northeast Winds 5 to 10 Mph.

Tonight 17 Sep Eastern Plymouth

Mostly cloudy. A chance of Showers in the Evening, then a chance of Showers and Thunderstorms after midnight. Patchy fog after midnight. Lows in the upper 50s. East Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Back River Mouth Temperature Statistics

September Temperature

Marshfield Airport (3.1 miles)

  • Lowest 9 September, 2025

    46.4 °F

  • Average September

    63.6 °F

  • Highest 6 September, 2025

    84.2 °F

Climate (2020–Present)

Marshfield Airport (3.1 miles)

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  • Average Low 2020–2025

    44.6 °F

  • Average 2020–2025

    52.9 °F

  • Average High 2020–2025

    60.7 °F
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